In the west, family size is shrinking.

My wife and I have dozens of first cousins each. Our children have exactly 12 first cousins, but their first cousins have anywhere from 9 to 18 first cousins.

Our grandchildren currently have zero first cousins.

Can you guess how many children we have?

It's just a guess without another given. If you ask for another clue, we can make it an easy SAT question.