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We are given twelve coins, one of which is a fake with a different mass from the other eleven.
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Determine that coin with three weighings and whether it is heavier or lighter than the others.
no idea wherer to start
i think first trial, we can start by having 3 groups of 4 coins each
|dw:1370089726156:dw|
but its taking 4 weighings to figure out fault coin, wid this
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