Oh sweet 16

by shiningsunnyday, Nov 27, 2016, 2:53 PM

Combo 3 homework (Medium) wrote:
$16$ students took part in a mathematical competition where every problem was a multiple choice question with four choices. After the contest, it is found that any two students had at most one answer in common. Prove that there are at most $5$ problems in the contest.
Solution

Tidbit

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3 problems over 1 night?!?!

mhm
This post has been edited 1 time. Last edited by shiningsunnyday, Nov 28, 2016, 2:12 AM

by zephyrcrush78, Nov 27, 2016, 5:51 PM

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hmm we are lacking in algebra

what's that
This post has been edited 1 time. Last edited by shiningsunnyday, Nov 28, 2016, 2:14 AM

by agbdmrbirdyface, Nov 27, 2016, 5:53 PM

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The Chuck Norris Hard problem, in retrospect, is not too much harder than many of the hard problems.

except a few of the H problems are problems that until recently have been unsolved
This post has been edited 1 time. Last edited by shiningsunnyday, Nov 28, 2016, 2:14 AM

by aftermaths, Nov 27, 2016, 7:28 PM

To share with readers my favorite problem I came across today :) (Shout for contrib.)

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