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Hard Logic Puzzle - Find 1 fake coin from 9, but using the scale only 3 times
Can you solve the dark coin riddle? - Lisa Winer
The Counterfeit Coin Riddle: Find the Fake in Two Weighings
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Counterfeit Among 8 Coins || Classic Puzzle #02
Counterfeit Coins and Balanced Ternary #SoME3
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Easy Variant of Famous Fake Coin Logic Puzzle - Can You Find the Fake Coin?
The Coin Riddle - Can You Solve The Counterfeit Coin Riddle? - Job Interview Logic Puzzles
Puzzle: Counterfeit Coins 5 real, 2 fake
The 12 Coin Weighing Problem