2N(180 - (N - 2) * 180 / N)
Put any positive integer as N, and you will get 720. Prove me wrong.
Put any positive integer as N, and you will get 720. Prove me wrong.
Last edited by DialaceStarvy on Fri Aug 07, 2015 11:24 am; edited 6 times in total
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DialaceStarvy
#1
Fri Jan 21, 2011 6:23 am
Yoshi Egg
Skochko
#2
Fri Jan 21, 2011 6:39 am
Administrator
n=11
22(180-9*180/11)=22(180-147.27272727272727272727272727273)=22*32.72727272727272727272727272727=719.99999999999999999999999999994
719.99999999999999999999999999994 =/= 720....
I WIN!
Basically any odd number will do
22(180-9*180/11)=22(180-147.27272727272727272727272727273)=22*32.72727272727272727272727272727=719.99999999999999999999999999994
719.99999999999999999999999999994 =/= 720....
I WIN!
Basically any odd number will do
DialaceStarvy
#3
Fri Jan 21, 2011 9:28 am
Yoshi Egg
That number is rational, so the 9 is repeated infinitely. Now apply that with this:
http://en.wikipedia.org/wiki/0.999...
719.99... = 719 + 0.99...
0.11... = 1 / 9
1 / 9 * 9 = 9 / 9 = 0.99...
9 / 9 = 1 = 0.99...
719.99... = 720
http://en.wikipedia.org/wiki/0.999...
719.99... = 719 + 0.99...
0.11... = 1 / 9
1 / 9 * 9 = 9 / 9 = 0.99...
9 / 9 = 1 = 0.99...
719.99... = 720
Last edited by DialaceStarvy on Fri Jan 21, 2011 9:31 am; edited 1 time in total
Skochko
#4
Fri Jan 21, 2011 9:29 am
Administrator
It's not repeated infinitely....
Its ended with a four...
Its ended with a four...
DialaceStarvy
#5
Fri Jan 21, 2011 9:38 am
Yoshi Egg
It does recur, it's just that your calculator could not record all the digits, so it stopped as late as it could. Without the exact digits, your calculations are flawed.
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