Question 612316: Two numbers 2^59 and 3^x are added ,if 5 is at the unit's place of the result, then value of x is?
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! Two numbers 2^59 and 3^x are added ,if 5 is at the unit's place of the result, then value of x is?
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2^59 has a 1's digit = 8
3^x has to have a 7
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x = 3 + 4n, n = 0,1,2,3...
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