There are 3 families with 3 children = 3 x 3=9.  If there are 2 twin boys, 2 x 2 = 4, 0-4=5. 
THere are 3 families in my neighbourhood with three children each; two of the families have twins. All twins are boys. At most how many girls are in these families? 

1) $$2$$ 
2) $$3$$ 
3) $$4$$ 
4) $$5$$ 
5) $$6$$ 