Khan/khan-exercises — Issue #13621: Greatest common divisor - hard
Author: KhanBugz
Created: 2012-02-11 01:11:28+00:00
State: open
Labels: firefox, hard, snowleo

this is way to hard

[greatest_common_divisor.html?seed=154&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/greatest_common_divisor.html?seed=154&problem=0&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/greatest_common_divisor.html?seed=154&problem=0&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5C%229%5C%22%22%2C4%5D%5D)

["9"]

Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:10.0) Gecko/20100101 Firefox/10.0

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