Question

in a family of cats,there are 2 uncool cats for every 3 coolcats. if these cats have 120 paws together,how many cool cats are there in the family?

Answer 1

One cat has four paws, so there are 120/4=30 cats.  If a "set" of cats is two uncool cats and three cool cats, there are five cats in a set, so there are 30/5=6 sets.  Since each of the six sets contains three cool cats, there are 18 cool cats in the family.