Khan/khan-exercises — Issue #6807: Pre-algebra challenge - false
Author: KhanBugz
Created: 2011-11-21 17:39:52+00:00
State: open
Labels: hard, lion, safari

[pre-algebra_challenge.html?seed=150&problem=metric (units)](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/pre-algebra_challenge.html?seed=150&problem=metric&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/pre-algebra_challenge.html?seed=150&problem=metric&debug&activity=%5B%5D)

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