|Enlightened||First to answer and accepted with score of 10 or more. This badge can be awarded multiple times.|
Ben Alpert earned this badge 3 times
nov 16 '11 at 9:37Balance chemical equations without trial and error?
nov 16 '10 at 22:50Probability that a stick randomly broken in two places can form a triangle
oct 1 '10 at 5:33How can you prove that the square root of two is irrational?