Factorials n! Explained Clearly in 1 Minutes

Added: 2026-05-07

[00:00:00]Most people think this is just an exclamation mark, but n factorial is why you'll never shuffle a deck of cards the same way twice.

[00:00:07]And in math, n factorial tells you how many ways you can arrange different objects. Like here, if you have six different colored balls, then six factorial gives you all possible arrangements.

[00:00:18]But there's a problem.

[00:00:20]The numbers grow insanely fast.

[00:00:22]Even eight factorial already means 40,320 different combinations.

[00:00:27]That's way too many to list one by one.

[00:00:30]So instead of counting them, mathematicians use a rule. n factorial is n multiplied by n minus one, then n minus two, and it keeps going all the way to one.

[00:00:41]Because in math, just like this exclamation mark, small things quickly turn into something massive.

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