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| 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 9:37
Balance chemical equations without trial and error?
nov 16 '10 at 22:50
Probability that a stick randomly broken in two places can form a triangle
oct 1 '10 at 5:33
How can you prove that the square root of two is irrational?
