A family photo contained:
one grandfather, one grandmother,
two fathers, two mothers,
six children, four grandchildren,
two brothers, two sisters,
three sons, three daughters,
one father-in-law, one mother-in-law, one daughter-in-law.
29 people you may think, but no! What is the fewest number of people that could have been in the photo?
[Ref: ZNAR] © Express Newspapers [Author: Mr Stone]
Hint: A single member of the family can be both a sister and a daughter.
Four children (2 boys and 2 girls), their mother and father, the mother's mother, and the father's father.