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View full lesson: http://ed.ted.com/lessons/can-you-solve-einstein-s-riddle-dan-van-der-vieren...
View full lesson: http://ed.ted.com/lessons/can-you-solve-the-prisoner-boxes-riddle-yossi-elran...
View full lesson: http://ed.ted.com/lessons/can-you-solve-the-counterfeit-coin-riddle-jennifer-lu...
View full lesson: http://ed.ted.com/lessons/can-you-solve-the-airplane-riddle-judd-a-schorr...
Practice more problem-solving at https://brilliant.org/TedEd/ Solution to Bonus Riddle:...
Practice more problem-solving at https://brilliant.org/TedEd/ Solution to Bonus Riddle:...
Practice more problem-solving at https://brilliant.org/TedEd/ Solution to the bonus riddle...
Practice more problem-solving at https://brilliant.org/TedEd/ Solution to Bonus Riddle:...
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View full lesson: http://ed.ted.com/lessons/can-you-solve-the-three-gods-riddle-alex-gendler...
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View full lesson: http://ed.ted.com/lessons/can-you-solve-the-river-crossing-riddle-lisa-winer...
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View full lesson: https://ed.ted.com/lessons/can-you-solve-the-bridge-riddle-alex-gendler Want...