- #1

drag

Science Advisor

- 1,100

- 1

Greetings !

What's all that stuff about (0! + 0! + 0! + 0!)! = 24 !?

Thanks !

Live long and prosper.

What's all that stuff about (0! + 0! + 0! + 0!)! = 24 !?

Thanks !

Live long and prosper.

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- Thread starter drag
- Start date

- #1

drag

Science Advisor

- 1,100

- 1

Greetings !

What's all that stuff about (0! + 0! + 0! + 0!)! = 24 !?

Thanks !

Live long and prosper.

What's all that stuff about (0! + 0! + 0! + 0!)! = 24 !?

Thanks !

Live long and prosper.

- #2

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- 9,018

- #3

drag

Science Advisor

- 1,100

- 1

Eeh... factorial ?

- #4

FZ+

- 1,599

- 3

4! = 4 * 3 * 2 * 1

So n!, where n is a natural number =

n * (n-1) * ... * 1

It can be mathematically proven that 0! = 1

Don't ask me how, because I forgot.

- #5

actually there is no proof that 0! = 1. look at it from this perspective:

disregarding the order in which we choose, how many ways we can choose k objects from a set of n objects? when finding ways to choose we use the following: nCk = n!/(k!(n-k)!). since there is only one way that one can choose 0 objects, we define 0! = 1 so that n!/(0!(n-0)!) = n!/0!n! = 1/0! = 1.

bascially 0! = 1 is defined as such because we simply need it to be. try to choose k = 0 objects from a set of n objects if 0! = 0. now that's chaos.

i hope that helps.

- #6

drag

Science Advisor

- 1,100

- 1

Aah...so 0! = 1 , in that case I knew what a factorial is but

I never heard of this equality so I thought this may be something else.

Thanks !

Live long and prosper.

- #7

Andy

- 69

- 11

4*3*2*1=24 how does that work?

- #8

dav2008

Gold Member

- 612

- 1

What do you mean? By definition 4!=4*3*2*1 which is 24. THats not the answer to the brain teaser, its just an exampleOriginally posted by Andy

4*3*2*1=24 how does that work?

- #9

Andy

- 69

- 11

What do you mean? By definition 4!=4*3*2*1 which is 24. THats not the answer to the brain teaser, its just an example

Sarcasm gets lost online.

- #10

dav2008

Gold Member

- 612

- 1

What are you talking about?!...I was not being sarcastic. I was answering your question. If I didnt understand your question, that isn't my fault.Originally posted by Andy

Sarcasm gets lost online.

- #11

Andy

- 69

- 11

I was trying to be sarcastic, most probably just a piss poor attempt at sarcasm, but i was trying.

- #12

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