SOLUTION: your fathers age this year is a multiple of 5. Next year his age will be a multiple of 6. How old is your father now?

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Question 1100008: your fathers age this year is a multiple of 5. Next year his age will be a multiple of 6. How old is your father now?
Found 2 solutions by Alan3354, ikleyn:
Answer by Alan3354(69443)   (Show Source): You can put this solution on YOUR website!
He's 5.
Answer by ikleyn(52781)   (Show Source): You can put this solution on YOUR website!
.
Two consecutive positive integers, such that smaller is multiple of 5 and the larger is multiple of 6, are  (in the reasonable range) 

       (5,6),  (35,36),  (65,66),  (95,96).


So, I assume, the reasonable answer to your question is


Your father's age    is  35 years,  or   65 years,   or  95 years.


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