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 Grandma's age (Posted on 2014-08-20)
When Grandma was asked about her age she told her grandchildren the following:
-"If the age of the oldest of you will be added to the product of ages of the younger two,- you would get my current age."
The three boys, Alex, Bob and Cid, started their thinking, but only Bob, the middle child provided the correct answer and added:
"If we had to perform the above operations a year ago - we would be off by 14 years...
What were the boys' Grandma's ages, given Alex's age was a prime number?

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 Solution to corrected version Comment 8 of 8 |

Alex is 7, Bob is 8, and Cid is 9.  Grandma is 7*8+9 = 65.

If they had performed the operations a year earlier, they'd have come up with 6*7+8 = 50, which would have been 14 years off from Grandma's age at that time (64).

 Posted by tomarken on 2014-08-21 09:32:20

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