Art of Problem Solving: 2012 AMC 10 A #23 / AMC 12 A #19
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4:46
Art of Problem Solving: 2012 AMC 10 A #24 / AMC 12 A #21
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15:12
Art of Problem Solving: 2012 AMC 12 B #25
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12:05
Art of Problem Solving: 2012 AMC 10 A #25
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39:49
1. The Geometry of Linear Equations
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4:00:37
4 Hours Chopin for Studying, Concentration & Relaxation
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11:31
Solving a 'Harvard' University entrance exam
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18:56
The Art of Linear Programming
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14:59