PUZZLE 24) A family party

Puzzle

A certain family party consisted of 1 grandfather, 1 grandmother, 2 fathers, 2 mothers, 4 children, 3 grandchildren, 1 brother, 2 sisters, 2 sons, 2 daughters, 1 father-in-law, 1 mother-in-law, and 1 daughter-in-law. Twenty-three people, you will say. No; there were only seven persons present. Can you show how this might be?

Answer

The party consisted of two little girls and a boy, their father and mother, and their father’s father and mother.

1. 1 Grandfather: let A
2. 1 Grandmother: let B(wife of A)
3. 2 Fathers: A and son of A and B(let C)
4. 2 Mothers: B and Daughter-in-law Of A, B and wife of C(let D)
5. 4 Children: C (son of A and B) and E,F, G (Son and Daughters of C and D)
6. 3 Grandchildren: E,F, G(grandchildren of A and B)
7. 1 Brother: E (brother of F and G)
8. 2 Sisters: F and G (sisters of E)
9. 2 Sons: C (son of A) and E (son of C)
10. 2 Daughters: F and G (Daughters of C and D)
11. 1 father-in-law: A (father-in-law of D)
12. 1 mother-in-law: B (mother-in-law of D)
13. 1 Daughter-in-law: D (Daughter-in-law of A and B)
14. Thus, there were only seven persons present A,B,C,D,E,F and G.