Very slow with maths.

[Andy]

Using “Only Four” ZEROS (0) and any Mathematical Operations/Symbols, to obtain the number 24.

So can someone explain to me how, (0! + 0! + 0! + 0!)! = 24

Im sure this is simple to most of you but i am very slow when it comes to maths.

[KLscilevothma]

http://www.physicsforums.com/showthread.php?s=&threadid=3545

[goo]

I still don't get it. Can someone explain?

4! = 4 x 3 x 2 x 1 = 24

0! = 0 x -1 x -2 x -3 ~ = 1

huh? :)

[Guybrush Threepwood]

no 0! = 1 (by definition)
you can think of it like this:
n! = (n-1)!*n
so:
3! = 2!*3
2! = 1!*2
1! = 0!*1 => 0! = 1

also there is no factorial for negative or not-integer numbers (at least I think...)

[Guybrush Threepwood]

well it seems there is possible to define factorial for complex numbers:
factorial from mathworld (http://mathworld.wolfram.com/Factorial.html)

[goo]

thanks guybrush, that cleared things up.

[Andy]

Thank you.