how many children?

Question

Smith has a number of children.
Brown has a smaller number of children.
Green has an even smaller number of children.
Black has the smallest number of children.
The total number of children is less than 18.
The product of the numbers of children is 120, the same as the
house number of Mr. Smith's House.
I asked Mr. Smith, "Is there more than 1 child in the Black family?"
When he answered, since I knew the house number, I also knew
the number of children in each family.

How many children in each family?

Answer 1

Wow that's tricky...

I got it:

Smith - 5 children
Brown - 4 children
Green - 3 children
Black - 2 children

sum - 14
product - 120


=)

Answer 2

1,4,5,6
or 2,3,4,5

either gets 120 and less than 18

we did not get a solid answer about the number of children in Black family