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Thread: Pi + Pi = 6 ???

  1. #1


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    Pi + Pi = 6 ???
    Is this an easter egg, or a joke? or is this a bug?
    Use OSX's Calculator in scientific mode and plug in "Pi + Pi =" and the output is 6. It should be 6.28318530718 (as indicated by plugging in "Pi * 2 =")

    Here is a discussion of the strange math on another forum...
    http://boards.straightdope.com/sdmb/...d.php?t=450746

  2. #2

    dtravis7's Avatar
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    What version of OSX you running? Here Leopard 10.5.1 it works perfectly. On the Calculator go to the View menu and be in Scientific mode and also set the Decimal places to something other than zero. I am set at 10. This is what I get with Pi+Pi.

    6.28318530718

    Same as my HP 20s and HP 42s RPN.

  3. #3


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    Hmm. mine says six as well using dtravis's method

  4. #4

    dtravis7's Avatar
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    Quote Originally Posted by mac0s9user View Post
    Hmm. mine says six as well using dtravis's method
    What version of OSX?

    I copied and pasted that right from the OSX Calculator.

  5. #5


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    10.4.11. I just did π + π and got 6

  6. #6

    dtravis7's Avatar
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    Quote Originally Posted by mac0s9user View Post
    10.4.11. I just did π + π and got 6
    I just booted my G4 DA with 10.4.11 Tiger and get 6. The bug is fixed in 10.5.1 for sure anyway.

  7. #7

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    For those of you needing a bit more accuracy for pi, here's a link for you. It's the first million decimal places of pi. Pi's actually been computed to 1.24 trillion digits.

    http://www.exploratorium.edu/pi/Pi10-6.html
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    dtravis7's Avatar
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    Quote Originally Posted by mathogre View Post
    For those of you needing a bit more accuracy for pi, here's a link for you. It's the first million decimal places of pi. Pi's actually been computed to 1.24 trillion digits.

    http://www.exploratorium.edu/pi/Pi10-6.html



    My HP 42s won't take it that far!

    WOW!

  9. #9

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    Quote Originally Posted by mathogre View Post
    For those of you needing a bit more accuracy for pi, here's a link for you. It's the first million decimal places of pi. Pi's actually been computed to 1.24 trillion digits.

    http://www.exploratorium.edu/pi/Pi10-6.html
    Yes... but how many decimal places of Pi can you recite from memory?

    :p



    (I'm lame and can never remember anything past 6 digits)
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  10. #10

    mathogre's Avatar
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    Quote Originally Posted by D3v1L80Y View Post
    Yes... but how many decimal places of Pi can you recite from memory?

    :p


    (I'm lame and can never remember anything past 6 digits)
    I'm no better. I'm good to 7 digits. Some people can remember a few more however. (100,000 back in 2006.)

    http://www.iht.com/articles/ap/2006/...orizing_Pi.php

    It's bad enough dedicating one's self to programming a computer to crunch 10^12 decimal places of pi. I could actually see that as a bit of fun. However, I couldn't imagine committing a huge chunk of my life to memorizing what amounts to 100,000 pieces of noise, which is what pi is after a dozen or so places.
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  11. #11

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    1.24 trillion!

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