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Posers and Puzzles

Posers and Puzzles

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

    -Ray.
  2. Standard member royalchicken
    CHAOS GHOST!!!
    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. 30 Jul '04 13:32
    Originally posted by royalchicken
    (0! + 0! + 0! + 0! + 0!)!
    Excellent!

    I love this puzzle.

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

    How does that total 120?
  5. Standard member ark13
    Enola Straight
    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. 04 Sep '05 14:32
    How is 0! equal to 1? Can someone please explain it to me?

    Thanks
  7. Standard member ark13
    Enola Straight
    04 Sep '05 14:40 / 1 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. 04 Sep '05 22:44
    That sounds like a botch job to me. What is the factorial of a negative number?
  9. Standard member ark13
    Enola Straight
    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. 05 Sep '05 01:44
    0! is one? That's a new one for me.
  11. 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. Subscriber AThousandYoung
    It's about respect
    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 member Bowmann
    Non-Subscriber
    05 Sep '05 14:52
    http://www.themathpage.com/aPreCalc/factorial.htm
  14. Subscriber Suzianne
    Misfit Queen
    06 Sep '05 13:30 / 3 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 member genius
    Wayward Soul
    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