Russia | Math Olympiad Question | You should know this trick!!
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1:05
Comparing two numbers with different bases | Math Trick
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12:52
Test d'entrée à l'université de Harvard
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14:14
Germany | A Nice Square Root Algebra Problem | Math Olympiad
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13:00
A Nice Algebra Problem | Math Olympiad | Find x = ?
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12:11
Math puzzle – Can YOU find the area?
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10:35
333333
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13:17
Olympiade, maths
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14:58