7 persons A,B,C,D,E,F,G. G=oldest(male). C=A's father. B=A's sister. F=E's husband. B is niece of F. G and D married. C younger than F. E older than B. A older than B. 3rd oldest=38yrs. 3rd youngest=35yrs. Who is 35 years old?

Correct answer: A

Solution

G=oldest(male). Family: G-D married; C=A's father; B=A's sister; F=E's husband; B=F's niece. Age order: B<A<C<E<F<...<G. 3rd youngest=A. 3rd oldest=E. A=35 years. E=38 years.

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