Khan/khan-exercises — Issue #11929: Pre-algebra challenge - pre-algebra challenge
Author: KhanBugz
Created: 2012-01-23 21:37:15+00:00
State: open
Labels: ie8, wrong-or-unclear, xp

[pre-algebra_challenge.html?seed=60&problem=perfect-squares (simplifying_radicals)](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/pre-algebra_challenge.html?seed=60&problem=perfect-squares&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/pre-algebra_challenge.html?seed=60&problem=perfect-squares&debug&activity=%5B%5B%22hint-activity%22%2C%220%22%2C12%5D%5D)

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