<p>Are you smarter than a Singaporean ten-year-old?<br>Can you beat Sherlock Holmes?<br><br>If you think the answer is yes - I challenge you to solve my problems.<br><br><br>Here are 125 of the world's best brainteasers from the last two millennia, taking us from ancient China to medieval Europe, Victorian England to modern-day Japan, with stories of espionage, mathematical breakthroughs and puzzling rivalries along the way.<br><br><br>Pit your w...
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