Khan/khan-exercises — Issue #15827: Pre-algebra challenge - Pre-Algebra Challenge
Author: KhanBugz
Created: 2012-03-09 17:09:33+00:00
State: open
Labels: firefox, snowleo, wrong-or-unclear

the question was simplify the square root of 16. I put the answer was 4. it said it was wrong. :( me sad now.

[pre-algebra_challenge.html?seed=19&problem=perfect-squares (simplifying_radicals)](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/pre-algebra_challenge.html?seed=19&problem=perfect-squares&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/pre-algebra_challenge.html?seed=19&problem=perfect-squares&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5B4%2C16%5D%22%2C16%5D%2C%5B%22hint-activity%22%2C%220%22%2C3%5D%2C%5B%22incorrect-activity%22%2C%22%5B16%2C4%5D%22%2C14%5D%2C%5B%22incorrect-activity%22%2C%22%5B4%2C16%5D%22%2C14%5D%2C%5B%22incorrect-activity%22%2C%22%5B2%2C8%5D%22%2C10%5D%2C%5B%22incorrect-activity%22%2C%22%5B4%2C16%5D%22%2C25%5D%2C%5B%22incorrect-activity%22%2C%22%5B4%2C16%5D%22%2C1%5D%2C%5B%22incorrect-activity%22%2C%22%5B4%2C16%5D%22%2C1%5D%2C%5B%22incorrect-activity%22%2C%22%5B1%2C2%5D%22%2C15%5D%2C%5B%22incorrect-activity%22%2C%22%5B1%2C2%5D%22%2C11%5D%2C%5B%22incorrect-activity%22%2C%22%5B4%2C16%5D%22%2C24%5D%5D)

[[4,16],[16,4],[4,16],[2,8],[4,16],[4,16],[4,16],[4,16],[4,16],[4,16],[1,2],[1,2],[4,16]]

Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.13) Gecko/20101203 Firefox/3.6.13

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