Brain Teasers Using Coins
Help with this riddle please, just two weighings?
Steven has 9 gold coins that are identical in appearance. However, a coin is Counterfit and weighs slightly less than the others. Using a scale, how can find the piece in only 2 pesos Counterfit?
Put 3 on the one hand, 3 the other. If the balances, counterfeiting is on the stack without using. If you wake up one side, counterfeiting is one of the bunch. Take the stack is counterfeit currency. Putting a penny on each side. If the balances, counterfeiting is the used one. If you wake up one hand, this is the counterfeit coin. Done!
Puzzles & Tricks: Twelve Coins Puzzle
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