It's the first brain teaser in our brand-new series! Finding the solution will take some mental muscle, but you're up for the challenge. Reading time 2 minutes Welcome to the first Gizmodo Monday ...
In 2007 Alexander Shapovalov suggested an unusual coin-weighing problem for the sixth international Kolmogorov math tournament [5]. A judge is presented with 80 coins that all look the same, knowing ...
In recent years a number of clever coin-weighing or ball-weighing problems have aroused widespread interest. Here is a new and charmingly simple variation. You have 10 stacks of coins, each consisting ...
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