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The Fake Coin

  • Games
  • Entertainment
  • Educational
  • Puzzle
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This puzzle is an old problem. You are given n coins, of which n-1 are genuine and one is fake. All genuine coins have the same weight and the fake coin has a different weight. The difference is only perceptible by using a balance. Find the fake coin and tell if it is lighter or heavier in m weighings as maximum.

The game has three levels:
n=3 coins, m=2 weighings
n=12 coins, m=3 weighings
n=39 coins, m=4 weighings