solimond

Okay, so...

The number puzzle.

A census taker is working a neighborhood one day, and knocks on a particular lady's door. After asking her the usual questions, such as name, date of birth, etc., he asks her about her children. He requests the number and their ages. The woman's reply is this:

I have three children. I will not tell you their ages. However, I will give you two hints.
1. If you add the ages of my children, you get the number 13.
2. If you multiply their ages together, you get the number on the house next door.

Somewhat stupefied, the man does the necessary arithmetic, and heads next door. After examining the house number, he returns to the woman and says that he cannot tell their ages.
"Very well, she says, I will give you one more hint:
3. My oldest child plays piano.

That is the puzzle. And before anyone asks: No, you do not need to know the number on the house next door to solve the puzzle. You WILL need paper and pencil for this one.

For getting the correct answer, you get... nothing! Except my respect.