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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