Khan/khan-exercises — Issue #8058: Pre-algebra challenge - I have the right answer checked on a calc.
Author: KhanBugz
Created: 2011-12-07 20:50:16+00:00
State: open
Labels: chrome, lion, wrong-or-unclear

The answer is -64 but the system will not accept the answer.

[pre-algebra_challenge.html?seed=186&problem=16 (exponents_3)](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/pre-algebra_challenge.html?seed=186&problem=16&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/pre-algebra_challenge.html?seed=186&problem=16&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5C%22-64%5C%22%22%2C83%5D%2C%5B%22incorrect-activity%22%2C%22%5C%22-64%5C%22%22%2C2%5D%2C%5B%22incorrect-activity%22%2C%22%5C%2264%5C%22%22%2C5%5D%2C%5B%22incorrect-activity%22%2C%22%5C%22-64%5C%22%22%2C74%5D%2C%5B%22hint-activity%22%2C%220%22%2C3%5D%2C%5B%22incorrect-activity%22%2C%22%5C%2264%5C%22%22%2C25%5D%2C%5B%22incorrect-activity%22%2C%22%5C%22.000976563%5C%22%22%2C62%5D%2C%5B%22correct-activity%22%2C%22%5C%2264%2F256%5C%22%22%2C10%5D%5D)

["-64","-64","64","-64","64",".000976563","64/256"]

Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/535.2 (KHTML, like Gecko) Chrome/15.0.874.121 Safari/535.2

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