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.
What is the fewest number of people that could have been in the photo?
Answer
There were 8 people: Four children (2 boys and 2 girls), their mother and father, the mother’s mother, and the father’s father.