UPP MATHS SPECIAL SPEED TEST - 04 BY || PRASHANT SIR

Added: 2026-05-13

[00:00:01]Hello friends, welcome to your own online platform Barabanki Genius Coaching. Friends, as you all might be knowing, the examination for recruitment of constable in Uttar Pradesh Police is going to be held at this time.

[00:00:15]For this we have brought a test series for you. We are providing you the discussion of its fourth number test. The three that have come before this will be available to you very soon because due to some technical issue we are not able to upload them right now.

[00:00:31]Ok? So let's move on to our first question without any delay. And your question has come before you. is saying that the total value of three chairs is 1414 and the ratio of their values ​​is 3 4 7.

[00:00:52]Ok? Then find the price of the highest priced chair. Correct? So see brother, their ratio is given as 3:4:5 sorry it is seven.

[00:01:04]3:7 is yours. Correct?

[00:01:09]So now this is the total value given. Ok? If there is a total value then we will see the total of the ratio, what is it? 4 3 7 14 happened. Given that 14 equals 1414, what do you have to find out? If you subtract one equal to the other, you get 1001. We will divide by 14.

[00:01:29]Ok? So the question is, what is the price of the highest priced chair and the highest priced chair shown here in proportion? Seven. So the value of seven has to be told. This will come 76, your answer will be there. So your option B will be correct. okay brother? So I hope you are understanding. You might be getting the sound.

[00:01:50]Everything must be visible clearly.

[00:01:53]If there is any issue then you can tell me through comment. Okay friends? Let's move on to the next question.

[00:02:01]This is our next question. It is said that two taps A and B can fill a tank in 3 hours and 5 hours respectively.

[00:02:15]Tap C can empty it exactly in two hours.

[00:02:18]This has to be taken special care of.

[00:02:20]Accordingly, if all three taps remain open, in how many hours will the tank be completely filled? Correct? So what do you do? Look, there is a tap A, there is a tap B and there is a tap C. We denote them by plus for the one who fills and minus for the one who empties. Their only denotation is to know that this is filling and this is emptying. Ok? Now A is filling it in 3 hours, B is filling it in 5 hours, C is doing it in 2 hours. Correct? We accept a task.

[00:02:53]He assumes the capacity of the tank to be what it should be.

[00:02:57]So we consider such capacity which is divided by their times and how much do we consider it to be? 30. Correct?

[00:03:07]Suppose the capacity of the tank was 30. Ok? If the capacity was 30 and it filled in 3 hours, how much will it fill in 1 hour? 15 sorry 10.

[00:03:17]10 will fill in 1 hour. How much will it fill in 1 hour? Six. And how much will it fill in 1 hour?

[00:03:23]Will empty 15. Now see here again sin has a special significance, this will fill this will fill and this will empty. Correct? So how much will these two together pay, brother? 16 And in the time it takes to fill 16, it will empty 15, so how much will reach the tank?

[00:03:42]Plus one. Correct? That means one is reaching in 1 hour and how much is to be delivered? 30 So how much time will it take? 30 hours. That means what will be your correct answer friends? It will be 30 hours. Option D is the correct answer. Ok? So let's move on to the next question. Let's see what our next question could be brother.

[00:04:07]And friends, this test has been done online and offline. We are discussing this.

[00:04:13]And online test is not available.

[00:04:17]You will keep getting it online in this way through discussions. Ok? Come on brother, now see what it has said that an amount of ₹1000 is invested at the rate of 5% simple interest per annum.

[00:04:30]If interest is added to the principal after every 10 years, then in how many years will the amount of Rs 2000 be received? So brother, this is simple interest. It is directly applied to the principal amount. But what did he say? After 10 years it was converted into compound interest. After 10 years, if the interest is added to the principal amount, it will start working like compound interest.

[00:04:54]Ok? So we will say that if you are getting 5% in 1 year then how much will you get in 10 years brother?

[00:05:03]So you will say you will get 50%. 50% of what? Of Rs 1000. What is 50% of 1000, brother?

[00:05:12]500. Correct?

[00:05:15]How much will it be? 500. So now if he is saying that add the interest of 10 years to the principal amount. added up. How much did you get after adding it? 1500. That means the remaining principal amount now becomes Rs 1500. And you need Rs 2000 as the amount. This became the principal and this amount. So how much interest do you want to generate brother? Have to do 500. Where to do it from? It has to be done from Rs 1500. How much percentage do you want to pay?

[00:05:44]So you will see 100/3% but 100/3% will be when how much is it in 1 year? 5% so how many years will it take here? Correct? If it is 5% in 1 year, then how many years will it take to reach that percentage? 20 / 3 or you can write it as 6 correct 2/3 years. So 6 right 3/ 2/3 years ago these and plus these ones from 10 years ago.

[00:06:12]Correct? So how many years did you take in total? 16 correct 2/3 this will be your answer. Option D is the correct answer. Okay friends? So if you want, I'm going to move to the side. You can also take a screenshot of this. Ok? You can also take notes comfortably. Ok?

[00:06:33]And those people who are sitting here offline, that is, in front of us, tell me brother, are you understanding? Yes sir. Yes sir. Okay, that's great. Are people even understanding it? The sound etc. is all proper. Does anyone have any problem? Did you guys take note? Yes sir.

[00:06:51]Let us move ahead then.

[00:06:56]See question number four next. What are you saying brother?

[00:07:03]Pooja wants to sell a watch at a profit of 20%.

[00:07:06]She buys that watch at 10% less price and sells it at ₹30 less, still she is making a profit of 20%. So no problem, let's assume that the CP of that object was 100.

[00:07:19]If the purchase price was Rs 100 and she said she wanted to sell it at a profit of 20%, then for how much would she sell it? Of 120. Then he said that if it is bought at 10% less price then it means where will it be reduced by 10%? From here.

[00:07:35]If it is reduced by 10%. Correct? So how many will you buy? 90's. Then they are saying sell it for ₹30 less.

[00:07:43]This is given in rupees and this is in percentage, let us keep it aside for a while.

[00:07:48]Then she said that there was a profit of 20%. In this way, if there is a profit of 20%, then where will it come from, friends? How much is the current cost price less than the current cost price? What is 20% of 90? If he makes a profit of 18, how much will he sell it for? Of 108. Brother, if you bought it for Rs 90 and make a profit of Rs 18, then for how much will you sell it? Of 108. Ok?

[00:08:12]So now see how much it was selling for earlier?

[00:08:15]How much is it selling for Rs 120 now? Of 18.

[00:08:18]How much did it reduce? 12. When 12 decreased here, actually 30 decreased. So you can say that the value of 12 is given as 30. Correct?

[00:08:28]What do we have to remove? The cost price which we have kept as 100. So what is 100 equal to?

[00:08:33]30 * 100 / 12 3 * 10 = 30 3 * 4 = 12 25 times 4 equals 250, that is, your answer will be 250. And the option which is coming correct for you is D option correct.

[00:08:52]okay brother. So let's move on to the next question in this sequence.

[00:08:58]What is the next question saying?

[00:09:03]Hey, don't run away brother.

[00:09:07]Firstly, if you become Chhotu then who will be able to see you? Grow up, brother.

[00:09:19]See, if the difference between simple interest and compound interest on a sum of money for 3 years at 5% per annum is given. Look brother, this question can be asked in many ways. Ok?

[00:09:33]Here is the difference between simple interest and compound interest for 3 years at 5% rate. Firstly, we can install it directly. How?

[00:09:42]By assuming a single number or the other way is to compound it by percentage.

[00:09:48]Direct Compounding. Correct? So let us explain direct compounding once.

[00:09:53]If we talk about simple interest at 5% in 3 years, it will directly come to 5 * 3. That is 15%.

[00:10:04]But, if we talk about compound interest, then how do we calculate compound interest? Look friends, it is 5%, so first of all let's cube 5. Cube of 5 is 125. We will write 25 from 125 and carry one.

[00:10:20]Correct? After that its second step is square of 5. how much is a? 25 and one is left from here, so let's write 26 and put a point. Correct? After that the third step is its three times five is 15, sorry, I made a little mistake in one minute. 1 minute 1 minute 1 minute 1 minute 1 minute 1 minute The second step is to multiply the square of 5 by three, brother. 75 75 and this remaining 76, now we will add the points and then 3 * 15 of five, that is, if we calculate the compound interest, it will come to 15.7625%.

[00:11:06]Ok? Whenever I teach a chapter some day, I will tell you all the complete details of what is to happen. Ok? Right now you can see this in the discussion.

[00:11:15]Now see what is the difference between them? So you will say 0.7625%.

[00:11:21]If you practice this once, you will automatically remember this value. And if you can remember it, then it is very good.

[00:11:28]How much has this equivalent given to you? 36.6 is okay? So from here you have to withdraw 100%.

[00:11:36]So 100% will be 36.6 * 100 / 7625 but I think everything was fine till here. But by the time we reached here, this calculation became strong. It became calculative.

[00:11:53]Now I will do it brother, I will get the answer only if I am forced to. But we want this not to be done.

[00:11:57]So [sound of clearing throat] what are we going to do in that case? Now let us tell you what to do in that case.

[00:12:05]You become small brother.

[00:12:08]Ok? Look, if you want to take a screenshot of this, you can do so. Correct?

[00:12:15][Sound of clearing throat] Right now, if you calculate it from here, you'll get the answer directly. Ok? So let's see what the other way could be.

[00:12:25]Which will be completely out of the calculation.

[00:12:27]In this second method your calculation will be over. Correct? let's watch.

[00:12:40]Look, what should we do directly? This 5%, convert it into a fraction. Ok?

[00:12:48]We can write 5% as 5/100 i.e. 1/20. Correct? If this was the rate of interest then this is also the rate of interest. What do we do now? We have to believe in a principle whose 1/20th we can find and how many times can we find it, friends? For 3 years. That is, a number which is divided successfully for 3 years. With whom?

[00:13:15]From 20. So that number could be the cube of 20. Let's just assume it's 8000.

[00:13:22]Correct?

[00:13:24][Sound of clearing throat] If the amount is 8000 then take out 1/20th of it, you will get the interest, take out 1/20th of it, how much is 400, okay brother, 400 came, if only 400 came then it is for the first year and if we take out 1/20th of the second year then it will be 400, but if we take only 400 then this is simple interest, we have to do compound interest also, so before this what does compound interest mean, principal plus interest on interest, so take 1/20th of the interest that has been received before, that is, take 1/20th of this also.

[00:14:00]What will be 1/20 of this? 20 ok.

[00:14:03][Sound of clearing throat] After this, when we come for the third year, we will have to do 1/20 again. So whose? We will definitely do 1/20 of 8000. Plus whatever interest I had already received, I got this. This is 1/20 of these three, so its 1/20 20 its 1/20 20 and its 1/20 one, okay, so this is its 1/20 one. Now see, if we keep only this much part here, how much should we keep friends, this one [sound of clearing throat] this is your simple interest and if we include it completely till here, then what is it? There is compound interest. This whole thing up to here, this compound interest. So if we talk about the difference, then this is just this much difference.

[00:14:54]How much is this? 61 61 is given equal to 36.6.

[00:14:58]Now look here brother, till here I don't think there was any calculation.

[00:15:03][sound of clearing throat] Now here it's 36.6, so we have to simply find out 8000.

[00:15:08]36.6 * 8000 divided by 61, this point will be removed from this zero. Ok?

[00:15:19]What will happen to you after that?

[00:15:23]After that your number will come to 61, we will divide it into six times.

[00:15:25]6 * 8 = 48 and two zeros. That means your direct answer will be ₹4800.

[00:15:33]If you solve the question on this pattern then your calculation will reduce. Ok?

[00:15:39]And this method has a name, can you guys tell me what is the name?

[00:15:44]Jhunjhuna method.

[00:15:45]Rattle method. Okay, that's great. So this was the method. With this, you can now reduce your calculations to a great extent.

[00:15:51]Yes, there are definitely a few extra steps. The reason is that now something or the other will be less. There will be something extra. okay brother? So let's move on to the next question. Next Question What could be the next question?

[00:16:12]A person travels 12 km from place A to B.

[00:16:15]Goes at a speed of 18 km per hour.

[00:16:17]Returns at an hourly rate. So the average speed for the entire journey. Look brother, what is average speed basically, that is total distance divided by total distance divided by total time, total distance plus total time equals average speed. Correct?

[00:16:34]But along with this there is another method. There is another arrangement saying that goes from A to B and then returns at a speed of. Meaning he went from A to B and then from here to here.

[00:16:48]Then came back from here. That means the distances are equal for both the moves. If the distance is equal then your speed is 2 * 12 * 18 / 12 + 18, so what will happen to you? 2 * 12 * 18 / 30 Exactly 6 * 5 = 30 6 * 2 = 12 So 18 * 4 = 72 / 5 i.e. 14 This will be your speed in kilometers per hour.

[00:17:26]Ok? So remember there is a system for this, the formula is 2xy/ x + y, okay? But this happens when covering the same distance. He has two moves, he has two moves.

[00:17:42]These can be done for both these moves when the distance is the same.

[00:17:46]What does rest moving average mean? Total distance divided by total time. Ok? Let's move on to the next question.

[00:17:54]Let's see what the next question might be.

[00:17:58][nasal sound] In a test with a full score of 500. A gets 10% less than B.

[00:18:07]In the same, B is written as 25% more than C.

[00:18:11]A got 10% less than B.

[00:18:16]B got 25% more than C.

[00:18:22]Correct? And C got 20% less than D. This gave it 20% less. Correct? So now look here the comparative number B is formed for A.

[00:18:34]C made for B. What made for C? D. Correct? So what was your final comparative number? D is made. So we'll start with D. Let's say D was 100 for you. And brother, if it is 20% less than this, how much will it be? 80. Correct?

[00:18:49]What did he say after that? By how much is B greater than C?

[00:18:53]25%. So whose 25% will it be brother? 25% of 80 If you subtract 25% of this, you will get 20. Correct? This 25% will come to 20. So 20 more than that so it's back to 100. And whose is 10% less than this? If 10% of 100 is 10 then how much will it be? 90. Is it clear friends? Correct. Now see, it is saying that a has got 360 marks.

[00:19:18]So how many did a get here? 90. 90 equals 90 equals gave you how much?

[00:19:24]360 okay? Then what percentage of the total marks did D get? Let's look at D.

[00:19:30]How much did D get here brother? 100. So how much will you get if you subtract 100? 360 * 100 / 90 9 * 4 = 36 so how much will it come? 400. Correct. I got this 400. But they asked us how many percentage marks did we get brother? Isn't it? So where did you get the 400 from? From 500. So you can immediately see what percentage of 500 this is. If we multiply by 100 then what percentage will we get 5 * 8 = 40? 80% of your B option will be correct.

[00:20:06]okay brother? I hope you all are able to hear everything clearly. Everything must be visible. If anyone has any problem then he can tell through comment. Correct? Move on to the next question.

[00:20:18]See what the next question says.

[00:20:23]A sum of money is sufficient to pay wages to A for 21 days and to B for 28 days.

[00:20:31]Accordingly, for how many days will that amount remain with both of them, brother, it is a simple matter, understand it as time and work.

[00:20:37]Say A does a work in 21 days and B does a work in 28 days. Ok?

[00:20:43]In how many days does A do it? A in 21 days and B in 28 days. In this the name of wages was taken.

[00:20:49]Correct? Meaning there will be a number of wages which will be divisible by both 21 and 28.

[00:20:56]Correct? Because if the daily wage is given for say X and 21 days then it will get multiplied. Then if the other person's daily rate for A was this and for B's daily rate was Y, then it will be given 28 days.

[00:21:11]What will be the product of these two numbers? There will be beans. Will be equal. Only then will this be possible. So we accept that number. Suppose that number was 84. Ok? Meaning there were 84. Was sufficient for 21 days. So how much do you get in 1 day? Four. And how much does he get in a day? Three. Correct? Now he is saying that both should be combined together.

[00:21:31]So both of you have to share ₹84, brother. Correct? If both have to be divided.

[00:21:38]A is getting four and he is getting three.

[00:21:41]How much did both of them get? You will get seven.

[00:21:44]Correct? If both get seven then it is ₹84.

[00:21:49]How many days will it last at ₹7 per day? 12 days. So what will be your answer? ₹1 will be 12 days. Correct?

[00:21:59]Meaning, he just took the name of the rupee. You have to do this with time and work only. okay brother? Let's move on to the next question.

[00:22:08]See the next question.

[00:22:16]What is the next question saying? 74 km Train x travelling at the speed of 52 km per hour from the opposite direction.

[00:22:25]This train runs at an hourly speed and needs special attention.

[00:22:29]Train x crosses train y running in the opposite direction in 12 seconds.

[00:22:36]If the length of y is 2/3 of the length of x.

[00:22:39]Look, let us make both the trains, this one is this one. Exactly this 74 km. per hour.

[00:22:48]Correct? And this is 72 52 sorry how much is this?

[00:22:57]52 km per hour. Moving in the opposite direction.

[00:23:00]This is there and this is going here.

[00:23:02]Ok? Then he is saying that in how much time will it cross this, in how much time? It is crossing in 12 seconds. So the time given is 12 seconds. Correct? After this, a special thing has been given. The length of y is 2/3 of the length of x.

[00:23:18]2/3 of x = y if x is given by three.

[00:23:25]Replace x with three. Ok? So what will happen in its place? There will be two in place of y.

[00:23:30]Ok? That means if this is two for you then how much will x be for you? Three three with this we take the d value. d length. Now if these two trains cross each other, what is the distance covered?

[00:23:45]Equal to the length of both. 3d + 2d so this will become 5d this distance. What is distance equal to? move * time. What will be the speed of 74 and 52?

[00:23:57]7 5 128 is 128 km/h. So we will do 5/18 and then what will we do after that? We will do it on time.

[00:24:13]And how much time is there? 12 will solve this.

[00:24:18]How much multiplication table of 18 is there? 128 will come. It will be 26, sir.

[00:24:23]One minute 4 2 6 yes sorry it will be 26. Correct?

[00:24:26]So 18 * 7 = 126 26 12 * 5 = 60 * 6 = 42 i.e. what will 5d be equal to? 420 420 So what is d equal to? 420 / 5 84 means 84 84 84 right? He asked us what? So what is the length of x considered to be the length of x? 3d so what will 3d equal? 84 * 3 3 * 4 = 12, 2 3 8 24 and one 252, so what will be your answer brother?

[00:25:05]D Option 252 [nasal sound] Okay.

[00:25:14]Yes, yes, take note. You guys also keep taking notes brother. If you are sitting and working hard then you should get some results.

[00:25:33]Look brother, the electricity has gone, we are doing our classes with the help of inverter. We are feeling hot right now, no problem, let it be, we will see what will happen, we will get drenched in sweat [nasal sound] come on brother, let's move ahead.

[00:25:54]Next question Kumudni, the ratio of monthly salaries of Anil and Kumud is 197. Anil and Kumud 197 If Anil and Kumud increase by 2000 and 1000 respectively then their ratio becomes 8:7.

[00:26:19]Ok? So what is Kumad's current salary?

[00:26:22]Brother, look, do one thing here, immediately with immediate effect, assume that this was x, this was x and this was y and this was y. This is the salary of Anil and this is the salary after the increase.

[00:26:36]Ok? Now if 19x is subtracted from 8y from the old salary then their increment will be equal. If Anil and Kumud have increment of 2000 and 1000 respectively then it will be equal to 2000 or say if you add 2000 to it then it will be equal to this, then by adding 2000 to it and writing it equal to this then bringing it here, we take this.

[00:26:59]Now if 17x is subtracted from 7y, it will give 1000. These have to be solved.

[00:27:10]How can I solve it brother? You guys tell me how will you solve it?

[00:27:15]Equation, yes the equation has been formed. Now what should we do in this? I have asked about their salaries.

[00:27:22]Current salary. The current salaries are these.

[00:27:25]This one is it, right? Current means after the increase. And if there are after increment, that means we have to save y. If you want to find the value of y, you have to eliminate x.

[00:27:36]What will you do to eliminate x? We will multiply the above by 17 and the below by 19. Correct? So this entire multiplication will happen from here to there. So what is 17 * 8?

[00:27:53]136 36x okay? And if they do this then both of them will be cancelled. No need to write.

[00:28:03]17 and 19 will become equal and what will we do with this? We will subtract the lower one from the upper one.

[00:28:08]Correct? So all the signs will change. So this is equal to what your 36x is equal to?

[00:28:15]17 * 2 34 3400 ok. And what is 19 * 7 here? 19 * 7 19 * 7 = 133 Yes sir.

[00:28:30]19 * 73 x will be equal to 19 * 1 = 1900, there will be three zeros brother. Now we have to subtract this from this because it has been cancelled. If we subtract from this, how much will be left? 3x = 1 2 3 0 14 9 goes into 5 and 1 is left. So what will x equal to, brother?

[00:28:58]What will x equal to? 3 * 5 = 15 5000 This comes to 5000 Now we are asked whether this is Kumud's current salary. Ok?

[00:29:11]What have we found? You took out y, it was y brother. This y this y and this y so this also gave the value of y. Correct? So y has come and we have to tell it as 7y equals y, so if we multiply 7y by 5000 then your answer will be 7/35000, the DC option will be correct, sir, in this 34 is fine brother, so see brother, did you understand or not, he has told that it will be 34 brother, is there any mistake? 8 is 7 and this is 19 17 19 17 8 and 7 okay? So if we multiply 17 by 9 5 14 by four, we will see that two one three will give only 34,000.

[00:30:10]34,000 went wrong somewhere. They are saying 34,000. Let's see it again brother. No problem. According to me, this much will come. Let's look at this question once again brother.

[00:30:38]Look, this time let us write here that what is the ratio of Anil and Kumud? 197 Okay, let's call this x and let's call this x, this was 19x. This was 17x. Ok? Then it's saying if we add 2000 to 19x. Is n't that what Anil has? Yes sir.

[00:31:05]Okay, right? And if you add 1000 to 17x, the new ratio becomes 8:7, cross multiple it like this. This will also give the value of x. What is 19 * 7?

[00:31:21]133 133x + 7 * 2 = Look, we made a mistake in the previous one.

[00:31:28]14 Yes, I made the same mistake, right? In calculation.

[00:31:32]17 * 8 = 136 What will 136x be equal to? 8000 sorry not equal to plus. x of eight okay? Now we will send it there. What will happen if we bring it here?

[00:31:48]3x goes there and becomes minus. What will 3x equal to?

[00:31:52]6000 then what is x equal to? 2000 2000 ok x will be equal to 2000 so if you put x here then how much will it be 34000 17 double 34 34000 [sound of clearing throat] the value of x has come if you put it here then this will be your answer ok brother but wait a minute 34000 will not come listen to me the previous one was also correct what is the current salary of Kumud current salary means after the hike and how much has Kumud got hiked?

[00:32:31]How much will you get if you add 1000 to 1000 34?

[00:32:34]35 What will be the answer?

[00:32:38]How did 31 go wrong? What should I tell you guys?

[00:32:42]Ok? Look, if you had asked your old salary, it would have been Rs 34,000. But it has asked Kumud's current salary. The current salary would be this, brother, increased by Rs 1000. Ok? Did you understand? Let's move ahead.

[00:33:03]Brothers, please pay a little attention to the question.

[00:33:06]Correct.

[00:33:10]What is the maximum percentage of discount? Which any trader can give at its face value.

[00:33:14]So that he does not suffer any profit or loss. Whereas he marked up his goods by 40%.

[00:33:21]Meaning, if the item was worth ₹100, then how much would it cost? 140 ok. Now he is saying that he should give discount and he should not make any profit or loss by giving discount, this means that if you bought it for Rs. 100 then you have to sell it for Rs. 100 only. If there is no profit or loss, then it will be bought for Rs 100 and sold for Rs 100. So how much discount will have to be given to come from 140 to 100? 40 from where?

[00:33:45]140 times 100, right? 0 0 2 * 2 = 2 * 7 = 14 So 200 / 7% or we can write it as 28. will come to approximately 5%. Correct? 28.5% this will be your answer. Let's move on to the next question. Let's look at the next question. The number is 12.

[00:34:20]Ramesh started a business with an amount of ₹00. After six months Kevin joined by investing ₹00.

[00:34:32]If brother Ramesh invests Rs. 00 at the end of the year. Correct?

[00:34:40]And after that the cabins come, brother, after investing ₹00, they come after six months, that is, they distributed the profit at the end of the whole year, they used their money for full 12 months, so for how many months did they use it, six months because they came after six months. Now make their ratio, this is twice this and this is twice this, then the ratio of 4 will become one. That means they will share the profits in the ratio of 4 to 1.

[00:35:07]What is the total? Five. 5 equal to you, how much will it be 10000, how much will it be brother 2000, okay, so whose profit have you asked, the profit of the cabin, you have asked for one equal to the cabin, so the profit is ₹2000, okay brother, let's stop this fan by disturbing its sound, it will work only when the basin is on, it will work when the light comes, no problem, let's read like this till then. You will enjoy it.

[00:35:45]You people also say, Sir, come online. Enjoy the fun online. Ok? Let us say that by selling 44 items a shopkeeper makes a profit equal to the selling price of 11 items.

[00:35:59]Then what will be his profit percentage?

[00:36:02]Brother, he simply said that he sold 44 items. The profit will be equal to the selling price of 11 articles.

[00:36:08]So let us assume the selling price of one item to be ₹1.

[00:36:15]What should we assume to be the selling price of one item? Let us assume ₹1. And if ₹1 was the selling price of one article then what would be the selling price of 11 articles? ₹11 and what happened? Profit was made.

[00:36:28]Correct? We have taken the selling price of an article as ₹1.

[00:36:32]Ok? So let's see it like this brother. Let the selling price of an article be ₹1. So what will be the selling price of 44 items brother? ₹4 and what will be the profit?

[00:36:44]Equal to the selling price of 11 i.e. ₹1 for ₹1, the price of one article is ₹1, so 11 articles cost ₹11 i.e. profit is ₹11. If I sold it for Rs 44 and made a profit of Rs 11, then how much would I have bought it for, brother? Of 33. Does this make sense? Yes sir. If it is sold for Rs. 44 and there is a profit of Rs. 11, then how much will it be bought for? Of 33. So now we have to tell where did the profit percentage i.e. profit of 11 come from?

[00:37:10]33 * 100 minus the cost price = 11 * 3 = 33 i.e. 33 = 1 b profit of 3%. So option D will be correct.

[00:37:25]Let's move on to the next question. Let's see what the next question could be.

[00:37:31]Next question: Difference between compound interest and simple interest on a sum of money at 10% per annum for 2 years brother, difference of 2 years is given at 10%, if you try to find the simple interest in 2 years [nasal sound] at 10%, what will be the simple interest for 2 years at 10% brother? 20% and if we calculate the compound interest then it will come to 21% how does it come [nasal sound] look here we have just explained it through the table.

[00:38:19]Compounding for three years was to be done, so the first step was to cube it. The square of the two-year action is 100.

[00:38:27]Write 100 and add points. Then the second step is double it. Its two times 20 20 and plus one this 21 this becomes 21% in 2 years [nasal sound] and what is the difference between them 1% and 1% equals to you, I have given 300, exactly 1% equals to 300, so you have been asked to find that amount, okay, if we do not know the amount then we always go by the value of 100% because this calculation of yours is on the base of 100%. Correct?

[00:39:04]So 1% equals this much, so 100% equals how much?

[00:39:08]3300 Your answer will come. okay brother? So let's move on to the next question. The next question is this.

[00:39:19]Question number 15.

[00:39:22]A train travels 80 km. It moves at a speed of per hour and covers some distance in that many hours.

[00:39:32]To cover the same distance in 4 hours, brother, if the distance is equal then we have one very special thing.

[00:39:37]Speed ​​Time Distance. If the distance is constant then remove it. All you have left is speed and time. Speed ​​and time are both inversely proportional.

[00:39:49]Meaning if this is x y then this will happen, what will happen to you, tell me children?

[00:39:53]y y will become x. Ok? So this goes on the concept of inverse proportion. So let us see, time has been given. Earlier it was taking 4.5 hours. Now it has to be decided in 4 hours. If we remove the point, we will increase the zero here.

[00:40:09]5 * 9 = 45 5 * 8 = This is the time ratio. So what about the speed, brother? 8 9 Okay, now that means this was eight speed, it has become nine.

[00:40:22]Earlier there were eight, so how many were there here?

[00:40:24]80 8 equals 80 one equals 10 km. Per hour. Kilometers per hour. So you have to say nine equals.

[00:40:36]What will happen equal to nine, brother? 90 km per hour. Ok? So your answer will be option D.

[00:40:44]Remember this, brother, if the distance is equal then both speed and time are in inverse proportion to each other.

[00:40:53]Inversely Proportional Thanks for explaining in English. Let's move ahead friends.

[00:41:01]very nice. There are only a few questions left, let's ask them too.

[00:41:06]Now the heat is saying [nasal sound] we are in trouble.

[00:41:09]We are saying we are in dire straits. We poor people don't have such things. What should be done?

[00:41:18]But it is there for show but it is not working for show. If the lights come on then it is time to go. Yes. Come on brother. Look [nasal sound] A photographer wants to offer 10% off the advertised price of a camera.

[00:41:34]What should be the price of a camera which costs Rs 600 and gives a profit of 20%? Brother, if he gives discount then from where does he give it? From CP. He takes profit, sorry, he gives discount on the mark price and from where does he take profit?

[00:41:53]From cost price. Ok? So now we don't know both of these. But what would these two be in themselves? Will be 100%. If it was 100% and he is saying he is giving 10% discount then how much will he sell it for? Take out 90% of it. Correct? And on this he is saying that if he makes 20% profit then for how much will he sell it?

[00:42:14]Its 120% brother, both of them were 100 in themselves. If I left out 10, it became 90%. And if I took 20% profit then it became 120%. Correct?

[00:42:24][nasal sound] What happened to these two now? The selling price has been reached. The selling price will be the price after the discount. The profit that will come after that will also be the selling price. Now both of these are selling prices. What if they are from the same article? Make it equal. So this is over from zero. If you say so, I can cut this also. If you say so, cut it. So you can easily make the ratio of CP and MP from here. 3:4. If CP is three then MP will be four. And the cost is given as CP only. Cost price means cost price. Three equals 600. Isn't it? How much will one equal? 200 then what is four equal to? 800. This is your answer. That means option B is the correct answer. okay brother? Let go.

[00:43:10]So move ahead.

[00:43:14]And the three tests that we had left before this, we are discussing this fourth test today. Ok?

[00:43:21]We will also discuss the remaining three tests daily. Tomorrow will be your third test.

[00:43:30]After that the fifth test will be held the day after tomorrow. The fifth one is to be held again the day after tomorrow. Isn't it? And then the next day we will discuss one more thing that is happening here and one more there.

[00:43:41]okay brother? Let the next question be saying that A and B together can complete a work in 72 days, B and C in 120 days, A and C in 90 days, write it very well brother, A and B in 72 days, B and C in 120 days and in how many days can A and C together do it? In 90 days. So we have to consider a task that cuts off these three digits from these three times. So we think that if we accept 360, you people will not feel bad.

[00:44:15]Tell me brother. Are? It won't feel like it at all. So you must remember the multiplication table.

[00:44:19]72 * 5 = 360. Are? 120 * 3 = 360. 90 * 4K is 360.

[00:44:26]Correct? What should we do now?

[00:44:31]So let us add all these. Ok?

[00:44:35]Look how many times this is added brother?

[00:44:38]twice. How many times is b? twice. c How many times? twice. Everything is being received twice. So 2a + b + c equals 12 equals what? 12. So what is a + b + c equal to?

[00:44:51]Six.

[00:44:52]12/2 means six. So you can say that the capabilities of all three have come. This means that all three together will do six tasks in one day.

[00:44:59]And they did it for 3 days.

[00:45:04]Ok? So if you do six things in 1 day, how much will you do in 3 days? 18 works. And what else did you ask? How much work will you do in 3 days?

[00:45:13]So where will you get 18 jobs from? From 360. So 18 * 2 = 36 i.e. 1/20 will do the work. So how much of the work did he do? 1/20 means your option C is correct.

[00:45:29]okay brother?

[00:45:30]So let's move ahead.

[00:45:32]Sir. Move on to the next question. Let's see brother.

[00:45:46]Come on brother, what is the 18th question saying? The average of nine integers is 11. But after calculation it was seen that while doing the original calculation the root number 23 [coughing sound] [throat clearing sound] was read as 32. Meaning, 23 was to be read and it was read. 32 How much did you read?

[00:46:06][sound of clearing throat] Reduce it. Three out of 12 became nine. Nine more reads. Yes sir.

[00:46:12]In how many integers?

[00:46:13]nine.

[00:46:14]Total nine numbers were read more, so how much more would have been read on one number? One one one more means that the current average is one more than the actual one. Okay, and what is the average? 11 If one comes extra then subtract one. So how much was it in reality?

[00:46:32]10 Your answer.

[00:46:35]okay brother? Yes sir. Do you understand?

[00:46:37]Sir. Does anyone have any problem?

[00:46:49]Come on brother, let's look at the next question. There are not many left, only four or five questions are left.

[00:47:03]If the annual income of A, B and C is in the ratio The total annual income of A and C is given by brothers A B and C is 1 : 3 : 7. What is the total income of A and C? Eight. Eight equals here, yes sir.

[00:47:21]How much?

[00:47:22]8 lakhs.

[00:47:22]8 lakhs. Is it 8 lakh or 80 lakh?

[00:47:24]8 lakhs.

[00:47:26]8 lakhs.

[00:47:27]Eight equals 8 lakhs. So whose name have you asked brother? Of B.

[00:47:32]What will be three equal to B? 3 lakhs. A 8 equals 8 lakhs and B 3 equals 3 lakhs. But for how many days is this 3 lakh, brother?

[00:47:41]Annual. It is annual. It's annual, right? Gave the annual and asked how is it?

[00:47:46]Monthly. We just have to keep this thing in mind because in this we make mistakes in the end.

[00:47:51]Ok? So if you want to ask monthly then multiply it by 12.

[00:47:54]12 * 500 is 300? Yes sir. You must remember the multiplication table. So that means 25,000 will be your answer. It was an easy question. Is? Let's move on to the next question.

[00:48:12]This is even easier. He is saying 60 kg. Alloy A is weighed in 100 kg. Alloy B is mixed with If alloy A contains lead and tin, and alloy B contains lead and tin, how much will the new alloy contain?

[00:48:32]So you have directly given 60 to 60.

[00:48:37]Ok? What is the ratio given in A and in Glass and tin 3:2 You can divide it in 3:2. How? The total will be 5, 5 = 60, 1 = 12, 3 = 36, 2 = 24. That means the substance in A is 36 and 24, right? Similarly, let's come now. Look at B, the total quantity in B is 100. What is ratio? What will it be if you add 1 4? Given 5 equals 100.

[00:49:15]How much will one equal? 20 means this will be 20 and how much will this become?

[00:49:20]80 80 4 = 80 right? So what was three more copper here brother? One more thing to look at. 100 kg is mixed. If A has lead and tin here brother lead and tin. There's tin and copper and there's tin and copper. This thing has to be taken special care of.

[00:49:45]How much is a tin? 20 And how much copper do you have? 80 80 okay.

[00:49:52]What is the amount of tin in the new alloy? I have asked Tin brother.

[00:49:54]What is 24 and 20?

[00:49:55]44 44 means it will become option B. Look, this is a very good question. Not rotated.

[00:50:01]Meaning he slowly wrote tin and copper. Glass and tin there. What is Mostly? While solving, we think that whatever is here must be given below also. Isn't it?

[00:50:11]However, it is not like that.

[00:50:14]Ok? So brother, let's move on to the next question. Yes sir. Have to note it. Do it, do it, do it.

[00:50:22]You guys also keep taking notes quickly. There is no problem.

[00:50:29]Well, if you understand then there is no need to note it down, you people will still get it on your channel, Shimla Didi is over, today is the last day of Shimla Didi.

[00:50:58]Okay brother, let's go son, yes sir, very good, let's see the next question, number 21, a motor boat driver travels to a place of 150 km distance at 50 km per hour and look at the return journey, I had just asked such a question, similarly whatever has gone has come, the same has come.

[00:51:25]In Do Chale Di Last it is asked what is the average speed? So 2x 50 * 30 / 50 + subtract this 4k 8 2 * 2 = 4 2 25 * 3 = 75 / 2 i.e. 37.5x distance is the same, right? Yes, here also the distance has been mentioned as the return journey, so it means whatever went, the same amount came back and to create confusion they have also given the distance so that you take out the time from it, find out the total distance and then divide it, so there was no need for this, okay see this question came from you and as far as we have got some information, the children who were giving the test were telling that there is some mistake in it, what is the mistake? Let's see.

[00:52:16]Brother, first of all we will deal with them. 18 13 21 18 13 21 52 21 25 14 This will be 112 in total.

[00:52:35]What will the total be?

[00:52:37]112% which should be how much? 100 should be 100%. Add this one, see the total is probably 100 only 15 25 40 10 50 10 60 10 70 10 80 80 and 9 18 2 20 80 20 100 this is 100 so that figure is correct this figure itself is wrong some value has been made wrong here so friends later when we come in next ST, we will discuss in the next paper, then we will bring this one again after making corrections okay so now let us move on to the next question A starts a business with ₹75000 and B after 5 months we had asked a similar question brother A starts a business with ₹75000. B brings ₹80 after 5 months. Ok? So how many days have you been in business, brother? Then he is saying that after the year, after the year, that means it was full 12 months and how many months did it last? If you come after 5 months, how many days would you have stayed? Seven. Make their ratio and these two zeros will be deducted, sorry.

[00:53:56]Three won't cut it.

[00:53:58]Ok? So two zero three zero, this three zero will be deducted. Correct?

[00:54:05]It will be cut in five to 15 times, five to 16 times. There will be more cuts in 15 to 16.

[00:54:14]4 * 4 = 16, 4 * 3 = 12 so 15 * 3 = 45 and 7 * 4 = 28 to be divided in the same ratio.

[00:54:23]45 and 28 okay? This money will be distributed in the same proportion.

[00:54:28]And what will be the answer to this?

[00:54:33]This will be an option. okay brother? A similar question was asked just now. Have to do it the same way. You guys can do it comfortably. Let's move on to the next question.

[00:54:47]On question number 25.

[00:55:00]Nine taps of equal capacity fill a water tank in 20 minutes.

[00:55:06]To fill the same tank in 15 minutes, all brothers, simply apply this as a compound proportion. There are nine taps, they fill in 20 minutes. So how many taps are needed to fill it in 15 minutes? x 3 * 3 = 9 3 * 5 = 15 5 * 4 = 20 4 * 3 = 12 This will be your answer. Correct? This compound proportion is a chapter from chapter. Yes, the same as m1 d1 t1 w1.

[00:55:31][nasal noise] Okay? next question. There is no next one. There is no next question.

[00:55:35]This matter is over. Okay brother, your discussion is over.

[00:55:42]okay brother. So let's conclude today's meeting here for you friends. Look, even when there was no electricity, we had a discussion and sweated it out. If you people are understanding the things then join us and then we will keep meeting you like this.

[00:55:58]Thank you till then. Thank you so much.