Khan/khan-exercises — Issue #5995: Properties of numbers 1 - What number could replace @ below?
Author: KhanBugz
Created: 2011-11-11 00:17:29+00:00
State: open
Labels: ie8, xp

Reporter: bryantanjenyong@hotmail.com

(+)+5=+(@+5)
Isn't the answer 0?
But I can't get it right.

[properties_of_numbers_1.html?seed=110&problem=associative-show-left](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/properties_of_numbers_1.html?seed=110&problem=associative-show-left&debug)

["1","0","-1","-1","NaN ","X","x","0","1",".","2","5","4","10","100"]

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