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I was about to guess but looks like @dtbahoney won since he guessed correctly AND re-steemed the post as required (Technewbie did not)

13/2= 6.5 years old 13-6.5= 6.5 years age difference. 65-6.5= 58.5 years old. I'm about 100% sure 58.5 years old is the correct answer unless you think 32.5 years old is the answer which is incorrect.

Seems he's got some weird technicality .

Guys, 1 year is equal to 12 months, we not using 10 here.
Well nobody win :p. Better luck next time. So the answer is 58 years 6 months. That the answer .sorry

58.5 years old is the mathmatical equivalent to 58 years and 6 months. Please dont bother posting contests if your not going to accept valid anwsers.

how many months in one year? seriously?

Maybe you should use months/dozen in your calculator instead of 10 hehe