## Task 3

Uwe says: "My father is 42 years old. My father is two years older than my mother. My mother is twice as old as my brother and I. I am two years younger than my brother." How old are Uwe, his brother, and his mother?
The mother is 42 - $2=40$ years old. Brother and Uwe are together 20 years. Since $20=9+11$, it follows: Uwe is 9 years old, his brother is 11 years old, and his mother is 40 years old.