Khan/khan-exercises — Issue #5719: Counting 2 - Correct answer being taken as incorrect
Author: KhanBugz
Created: 2011-11-07 14:43:02+00:00
State: open
Labels: firefox, win7

There are 13 people in a room.

If everyone shakes everyone else's hand exactly once, how many handshakes occurred?

13 x 12 = 156.

Put 156 unhappy face turns up. Hints even support 156.

[counting_2.html?seed=185&problem=handshakes](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/counting_2.html?seed=185&problem=handshakes&debug)

["156"]

Mozilla/5.0 (Windows NT 6.1; WOW64; rv:7.0.1) Gecko/20100101 Firefox/7.0.1

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