1. Joined
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    29 Jul '04 18:18
    Given five zeroes, using any mathematical operations, can you make a total of 120?

    -Ray.
  2. Standard memberroyalchicken
    CHAOS GHOST!!!
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    30 Jul '04 05:16
    Originally posted by rgoudie
    Given five zeroes, using any mathematical operations, can you make a total of 120?

    -Ray.
    (0! + 0! + 0! + 0! + 0!)!
  3. Joined
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    30 Jul '04 13:32
    Originally posted by royalchicken
    (0! + 0! + 0! + 0! + 0!)!
    Excellent!

    I love this puzzle.

    -Ray.
  4. Joined
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    04 Sep '05 13:54
    Can you please explain how this puzzle works?

    How does that total 120?
  5. Standard memberark13
    Enola Straight
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    04 Sep '05 14:05
    Originally posted by skims
    Can you please explain how this puzzle works?

    How does that total 120?
    0! (factorial) is 1. So it's (1+1+1+1+1)! = 5! = 5*4*3*2*1 = 120
  6. Joined
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    04 Sep '05 14:32
    How is 0! equal to 1? Can someone please explain it to me?

    Thanks
  7. Standard memberark13
    Enola Straight
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    04 Sep '05 14:401 edit
    Originally posted by skims
    How is 0! equal to 1? Can someone please explain it to me?

    Thanks
    It's to make the following equation work. (x!)/(y!)=(x-y)! This works for all numbers. I'll give an example, let's say x,y=3, then it would be (3!)/(3!)=(3-3)! ---> 6/6=0! 1=1 and the equation holds since 0!=1. But if it equalled zero, like you'd expect, then the equation wouldn't work.

    It's similar to how x^0=1
  8. Joined
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    04 Sep '05 22:44
    That sounds like a botch job to me. What is the factorial of a negative number?
  9. Standard memberark13
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    04 Sep '05 23:12
    Originally posted by nickhawker
    That sounds like a botch job to me. What is the factorial of a negative number?
    Actually, my equation doesn't work. It must be some different one. I do know that the factorial of 0 is 1 though. I'll let someone with more experience (and memory 😛) take over for me in explaining this.
  10. Earth Prime
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    05 Sep '05 01:44
    0! is one? That's a new one for me.
  11. Joined
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    05 Sep '05 06:07
    Originally posted by Coconut
    0! is one? That's a new one for me.
    I didn't know that either, but my calculator agrees.
  12. SubscriberAThousandYoung
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    05 Sep '05 08:03
    Originally posted by crazyblue
    I didn't know that either, but my calculator agrees.
    Yeah, it is. It's just defined that way.
  13. Standard memberBowmann
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    05 Sep '05 14:52
    http://www.themathpage.com/aPreCalc/factorial.htm
  14. SubscriberSuzianne
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    06 Sep '05 13:303 edits
    This is not the first time this subject has been visited in this forum... there was a thread called 0! in this forum posted on Jun 20, 2004. Right now, it's on page 20 of this forum if you care to take a look...

    or, let's see if I can copy the url:

    http://www.redhotchess.com/board/showthread.php?threadid=11652

    ack, tried to make it a link but dunno the bracket code for it
  15. Standard membergenius
    Wayward Soul
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    07 Sep '05 12:26
    Originally posted by Suzianne
    This is not the first time this subject has been visited in this forum... there was a thread called 0! in this forum posted on Jun 20, 2004. Right now, it's on page 20 of this forum if you care to take a look...

    or, let's see if I can copy the url:

    http://www.redhotchess.com/board/showthread.php?threadid=11652

    ack, tried to make it a link but dunno the bracket code for it
    oooh-i wondered why bowmann had dug up that old thread 😛
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