If I said “3!“, would you think the 3 is really excited, or that you have to shout the number?


In fact, it’s a mathematical operation called factorials, and boy are they fun! They may seem complicated at first, but they’re really a very basic concept. The exclamation point behind a number means that you multiply that number by each successively lower number, in order, until you get to one.


So 3! would be 3 x 2 x 1 = 6.


Take a look at the video for an explanation of how factorials work and how they can be used.


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Comments

One Response to “Factorials”

  1. Emily Crawford says:

    These videos make math so cool! Now I understand the practical applications of factorials, and I can understand how 0! equals 1 – in two different ways! Did I mention that my brother and I love to play Bagels now? 😀

    Mary Crawford (age 12)