加拿大10年级数学题

题目

加拿大10年级数学题
一道数学题..怎么也想不出来了
A census taker came to a house with no one home.He asked a neighbour the ages of the three inhabitants and was told "the product of their ages is 252,the sum of their ages is the house number." Later,the census taker returned saying" I need more information." The reply was "the twins are named Derek and Doreen",the census wrote down the ages and left.
What are their ages?

答案

孩子3岁
父亲或母亲28岁
还有2,2,63的可能