Question

Mr. SMITH had 4 daughters, each daughter had a brother ... How many sons does Mr. Smith have?

Answer 1

one son

Explanation:

each daughter had a brother, means there is only one son

Mr. smith has 1 son

Answer 2

He tells us that the 4 daughters have a brother, so, since they belong to the same family, the sisters are the same because they have only one brother.

Answering our question:

or Mr. Smith has 4 daughters and also 1 son.