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Table of content for
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| The 8 ball problem | The 8 ball problem, the puzzle almost all developers gets wrong! Given 8 balls and a scale identify the one heavier ball using the least number of weighings. |
| The Burning Rope Problem | A mindbending puzzle that'll keep your brain going for hours! Given two pieces of rope, and some fire identify when 45 minutes has passed. |
| The Japanese river IQ Test | Japanese IQ Test. Can you get everyone to cross the river? |