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20140124, 13:40 #1
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Speaking of former math teachers...
Not a puzzle, but a previous comment reminded me of a college prof that insisted we learn PI to more decimal places than most would ever want/need.
The phrase to trigger your memory was: May I have a large container of coffee? (count the letters).
If you got the coffee and were polite and said "thank you," you got 2 more decimal places.
Never forgot it: 3.141592653(5898...remembered those too for some odd reason).

20140124, 15:19 #2
Last edited by bassfisher6522; 20140124 at 15:29.

20140130, 11:16 #3
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3.14159 26535 89793 23846 26433 83279 50288 41971 69399 37510 58209 74944 59230 78164 06286 20899 86280 34825 34211 70679............
your last digit seems wrong assuming the ( was a typo and not a digit=9
in which case the second 3 was the last correct digit as posted
my son had a poster with a couple thousand digits
interesting but useless

20140130, 20:40 #4
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No, type a typo...I was just adding a few more digits, and rounded the last one. 3.1415926535898 (actually, 897...)
I wonder who/what might ever use it to some extremely large number of decimal places? Space calculations? Or just mathematical challenges to find more digits.

20140130, 22:44 #5
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I remember PI to 3.141592654 but also remember using 22/7 for rough calculations!