Very few people can solve. Which martini glass is closest to 1/2 full?
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Only 1% of people can solve. How many squares?
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Can you solve Microsoft's bridge and torch riddle?
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99 percent don't know these secret math tricks
18:53
Cones are MESSED UP - Numberphile
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Could you pass this interview? The famous batteries and flashlight logic puzzle
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Are these words "untranslatable" into English?
22:07
The Odd Number Rule
2:21:37