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12 Identical Balls

Weigh 1: Divide into 6 balls each and weigh. Pick the heavier group. Weigh 2 : Divide into 3 balls each from the heavier group in Weigh 1, Pick the heavier group Weigh3 : From 3 balls left, weigh any two if it balances the third ball was the heaviest. else the heavier ball was either of the ball which was heavier.