10 out of 100 students got this right! 😳 Are you among the 5?

Added: 2026-05-09

[00:00:00]Hello, great mind. Let's look into this question, okay? And some of type of this particular question because I noticed that some of some people are always confused when it comes to simple expression like this. Even though some people are complaining that we don't use need to be solving this, but we have to because some people need to understand the difference, especially when using PEMDAS, okay? The math order of operation, okay? Now, for this particular question, some people made mistake because what they did first was to add, okay? Because some people when they see this particular type of question, all they used to do is that they will solve it from the just straight without knowing that there is rule to that, okay? So, these people some people what they did was to add these together. 9 + 4 9 + 5, sorry. Equals 14 * 0 + 4 factorial, okay? Now, from here, 14 * 0 = 0 + 4 factorial, okay? And 0 + 4 factorial = 4 factorial, okay? Now, this 4 factorial simply means that we are going to express this 4 multiply 4 by 3 by 2 and by 1, okay? You multiply it in descending order in this form, okay? Now, from here, 4 * 3 is 12, okay?

[00:01:22]It will be 12 * 2 * 1. And 12 * 2 = 24 because 24 * 1 = 24. And this is wrong, okay? Because some people they do not understand that they are supposed to make use of the order of operation, which is PEMDAS, okay? Let's write it down. It's always important that you write it down so that you don't get confused, okay? PEMDAS.

[00:01:47]This is parenthesis. This is exponent.

[00:01:51]This is multiplication. This is division. This is addition and this is subtraction, okay? Now, from here, between this um multiplication and division, these two are of the same priority. That is to say, if you found both of them, that is multiplication and division in a question, in one question, you have to solve it from the left to the right, irrespective of the position of either multiplication or division coming first, okay? Now, this is um the same priority as well, okay? And the same thing is applicable to this addition and subtraction, okay? So, from here, if we're using this order of operation to solve this, you can see that we have um addition, two addition there, and multiplication, okay? And because multiplication is of higher priority to addition, we're going to solve this first, okay? So, we'll have 5 + 9 * 0 = 0 + 4!

[00:02:50]Okay? So, we'll have um this is addition now, so we'll just add. We'll have 5 + 0 + 4! and that becomes 5 + 4! Okay? Let's get the value of 4!. 4! = 4 * 3 * 2 * 1, okay? 4 * 1 = 12 * 2 * 1, okay? And 12 * 1 * 12 * 2 * 1 = 24, okay? So, from here, we have this to be equal to 5 + 24, okay? And 5 + 24 = 29 as our correct answer, okay? Now, let's attend to this particular one, too, okay? By using the order of operation, PEMDAS. So, we'll write it down so that we don't forget, okay? Or we don't get confused along the line, okay? Now, this is parentheses.

[00:03:47]This is exponent. This is multiplication. This is division.

[00:03:52]This is addition and this is subtraction, okay? And always remember that these two are of the same priority and these two are of the same priority, okay? Now, from our question, you can see that we don't have um parenthesis. We have exponent. We have multiplication. We have division and we have addition, but no subtraction, okay?

[00:04:14]Now, because parenthesis is of higher priority to all these except uh I'm sorry, because exponent exponent is of higher priority to all these ones here, we are going to attend to that first. So, we have 4 + 2² that is 2 * 2 and that is 4 * 3² / 3, okay? So, we have 4 + 4 * 3² is 3 * 3 and that is 9 / 3, okay? So, from here, you can see that we have um we have um um we have multiplication and division here, okay? And because they are of the same priority, we are going to solve it from the left to the right, okay? So, we are to multiply first. So, we have 4 + 4 * 9 = 36 / 3, okay? So, we have 4 + 36 / 3 = 12, okay? And 4 + 12 = 16 and this is the right answer. So, before you go, let's attend to this question as well, okay? Now, we are going to divide this line because we are going to solve the mistake and the correct one, okay? So, people made mistake by um adding these together, okay? They added these together. 10 + 5 = 15, okay? Times 0 + 3 factorial, okay? So, from here, they multiplied 15 * 0 = 0 and 0 + 3 factorial equals 3 factorial, okay? And 3 factorial means 3 * 2 * 1. 3 * 2 is 6 and 6 * 1 = 6. And this is wrong. Now, let's solve it very well by writing out the order of operation PEMDAS.

[00:06:06]Okay?

[00:06:08]So, where P is parenthesis, E is exponent, M is multiplication, D is division, A is addition, and S is subtraction. Always remember that these two are of the same priority and these two are of the same priority, okay? You have to solve it from the left to the right whenever you have multiplication and division in a one particular question. And this one are the same the same thing is applicable, okay? So, we have 10 + 5 * 0 + 3 factorial, okay? So, from here we are to multiply first before adding because multiplication is of high priority to addition, okay? So, we have 10 + 5 * 0 = 0 + 3 factorial. So, we have 10 + 3 factorial, okay? Now, 3 factorial = 6. So, we are going to have 10 + 6 and that's = 16. And this is our right answer. Thank you so much for watching. Please share this video and subscribe to this channel. Bye.