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askari.z55
Senior Proud Pakistani
Joined: 15 Nov 2007
Posts: 1511
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| 12 Coins |
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You are handed 12 metal coins which look alike. However, one of them is fake and weighs either more or less than each of the other 11 coins (which all have identical weight). To measure or compare weights you have only a pan balance that tips down to the side with the greater weight or stays in balance if both pans hold equal weights.
With how many weightings can you find the fake coin and also determine if its weight is more or less than the weight of the other coins? How do you do it?
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"When some blessings come to you, do not drive them away through thanklessness."(Imam Ali a.s.)
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| Sat Dec 22, 2007 11:17 pm |
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shakeelmscw
Shayari Moderator
Joined: 22 Aug 2007
Posts: 5199
Location: United Arab Emirates |
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Three weighings is required to know.
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*(`'·.¸(`'·.¸*¤*¸.·'´)¸.·'´)*
«´¨`·.Shakeel Ahmed ..·´¨`»
*(¸.·'´(¸.·'´*¤*`'·.¸)`'·.¸)*
(((**A happy person is not a person in a certain set of circumstances, but rather a person with a certain set of attitudes**)) |
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| Sun Dec 23, 2007 12:23 am |
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askari.z55
Senior Proud Pakistani
Joined: 15 Nov 2007
Posts: 1511
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Three weighings is required to know. |
100% Right
Same Brilliance Repeated
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"When some blessings come to you, do not drive them away through thanklessness."(Imam Ali a.s.)
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| Sun Dec 23, 2007 12:53 am |
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shakeelmscw
Shayari Moderator
Joined: 22 Aug 2007
Posts: 5199
Location: United Arab Emirates |
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it was more tricky
_________________
*(`'·.¸(`'·.¸*¤*¸.·'´)¸.·'´)*
«´¨`·.Shakeel Ahmed ..·´¨`»
*(¸.·'´(¸.·'´*¤*`'·.¸)`'·.¸)*
(((**A happy person is not a person in a certain set of circumstances, but rather a person with a certain set of attitudes**)) |
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| Sun Dec 23, 2007 12:55 am |
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