Riddle: There are two brothers. The older brother is 4 years old, the younger brother is half his age. The older brother is now 100 years old, the younger brother is half his age. How old is the younger brother?
Riddle: There's a big green house, and in this green house there's a white house, and in this white house there's a red house, and in this red house there are black baby's. What am I?