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Prove You're a Logic Ninja by Cracking 34 Riddles

Prove You're a Logic Ninja by Cracking 34 Riddles

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Prove You're a Logic Beast By Cracking 55 Riddles

Prove You're a Logic Beast By Cracking 55 Riddles

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Can you solve the passcode riddle? - Ganesh Pai

Can you solve the passcode riddle? - Ganesh Pai

View full lesson: http://ed.ted.com/lessons/can-you-solve-the-passcode-