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The Solutions


Psyche Them

This problem was correctly solved by:

jameka horton from columbia s.c., Age: 11
if you end up with an odd number that is only because you doubled the ten and not the five.
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Stephanie from California United States, Age: 12
The method is easy. Since you would triple the value of the coin in your right hand the value would be 30 if the dime is in the right. Then you double the value of the coin in your left hand and the nickle is in the left the value would be 10. If you add the values together you would get 40. 40 is an even number so the would therefore be in your right hand. If the nickle is in your right hand you would triple that and you would get 15. Then the dime would be doubled because the dime is in your left this time. The value would be 20. If you add the numbers together, you would get 35. Since 35 is an odd number the dime would therefore be in your left hand..
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Vikram from singapore, Age: ?
Two times the dime or nickel in the left hand always results in an even and hence it result is irrelevent. 3 times the coin in the right hand helps to make up the decision. so if the sum is even, dime is in the right hand else if odd, it is in left hand..
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Josriya from NJ, Age: 10
All you have to do is pay attention to the multiplacation of the nickle because any whole number that you multiply by ten is always going to equal to an even number. If the nickle is in the right hand the sum is odd because your friend would have to multiply five times three and that equals fifteen. However if the nickle is in the left the sum is even because your friend would have to multiply five times two and that equals ten.
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a.j. from california usa, Age: 9
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joey from Ms., Age: 11
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