Can you solve all of these in under 60 seconds?
- A boy has as many sisters as he has brothers, but each of his sisters has twice as many brothers as she has sisters. How many boys and girls are there in the family?
- A man and his sister were out walking together one Saturday morning. The man pointed across the street to a boy and said: ‘That boy is my nephew.’ The woman replied: ‘He is not my nephew.’ Can you explain this.
- Two Russians walk down a street in Moscow. One Russian is the father of the other Russian’s son. How are they related?