You have 8 coins. 3 of them weigh x units, 3 y units, 1 a units and 1 b units. They are all mixed and look identical. You have to find the lightest coin in minimum number of weighing (balance)



You have 8 coins. 3 of them weigh x units, 3 y units, 1 a units and 1 b units. They are all mixed an..

Answer / sibananda dash

3 : suppose there are hhhlhhhh: h for heavy and l for light

8 coins ;

divide into two part i.e. hhhl ,hhhh;
take hhhl because it has less weight : as we have to find
light coin

similarly proceed in the same way ;

Answer : 3

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