Question

I think the answer is 15 but I am not sure because I have no idea what the ! means. So if someone could help that would be great.

What is the value of the expression? 5!(8 – 5)!

Answer 1

Basically look at it this way:
\[5! = 5 \times 4 \times 3 \times 2 \times 1\]

Answer 2

Now in (8 - 5) you have to do what is inside the parenthesis before you actuallty determine to factorial.

Answer 3

Oh so the ! means that number times all the numbers that are smaller?

Answer 4

you're not gonna do 8! and 5! because that would be a long answer.

Answer 5

Yes.

Answer 6

Thank you

Answer 7

So (8-5)! is 3! not 8! - 5!

Answer 8

So first do:

5 * 4 * 3 * 2
3 * 2

You don't have to put in the 1 because that really doesn't do anything. Once you did that you just add em up and you got the answer. Let me know what you get. :)

Answer 9

126

Answer 10

Wait no, multiply don't add. My bad.

5!(3)!

Answer 11

So 120 * 6

Answer 12

720

Answer 13

Yep. :P

Answer 14

Thank you @Unanimoose

Answer 15

Np. :)