2 mathematicians meet at their school reunion.
mat 1 : Hey old friend, I heard you have 4 child, How old are they?
mat 2 : Sum of their multiplicative inverse is 1, and sum of their age is your sister age.
mat 1 : But, I still don't know their ages.
mat 2 : 2 oldest are twin.
mat 1 : ok, I know know.

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## jasen

2 mathematicians meet at their school reunion.

mat 1 : Hey old friend, I heard you have 4 child,

How old are they?mat 2 : Sum of their multiplicative inverse is 1, and sum of their age is your sister age.

mat 1 : But, I still don't know their ages.

mat 2 : 2 oldest are twin.

mat 1 : ok, I know know.

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