Of 100 children in Grades 5 and 6 , three-quarters have pets; 40 children have a dog, and 18 children have a cat. How many children have other kinds of pets?

To find out how many children have other kinds of pets, let's first determine how many children have pets overall. Three-quarters of 100 children is 75 children. Now, out of these 75 children, we know that 40 have a dog and 18 have a cat. We need to consider if there might be any overlap, but for simplicity, let's assume no children have both a dog and a cat. So we can calculate: 75 (children with pets) - 40 (with dogs) - 18 (with cats) = 17 children. Thus, 17 children have other kinds of pets! Isn't it delightful to know that so many of these kids share their lives with furry friends?