Posted by: helpjava11 June 3, 2014
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I was thinking, first divide 12 coins to 4 parts A,B,C,D
- weigh A & B : IF the weigh is same that mean false coin is in C OR D. If they weigh different either A or B has false coin.
- if they A & b weigh different, than we know aither A or B has dalse coin. so weigh A & C now. if the A& C weigh same, false coin is in B. other wise A has false coin.
- Now we have one chance to weigh and have 3 possible false coins.
- By weighing A & C we already know if hte false coin is heavier or lighter. ( becasue if we weigh A & C, and the weight is different we know A has false coin. so by looking if A is heavier or lighter we know the false coin is heavier or lighter. )
- Finally, weigh any two of 3 coins left. if the weight is same, we know third coin is false. if weight is different we know which is false by the weight.
Milyo ki milena NAS bro. I tried.
- weigh A & B : IF the weigh is same that mean false coin is in C OR D. If they weigh different either A or B has false coin.
- if they A & b weigh different, than we know aither A or B has dalse coin. so weigh A & C now. if the A& C weigh same, false coin is in B. other wise A has false coin.
- Now we have one chance to weigh and have 3 possible false coins.
- By weighing A & C we already know if hte false coin is heavier or lighter. ( becasue if we weigh A & C, and the weight is different we know A has false coin. so by looking if A is heavier or lighter we know the false coin is heavier or lighter. )
- Finally, weigh any two of 3 coins left. if the weight is same, we know third coin is false. if weight is different we know which is false by the weight.
Milyo ki milena NAS bro. I tried.