Factors, Multiples, Multiplicative Comparison Problems

There were 21 boys playing in the park. That is 3 times the number of girls who were playing. How many girls were playing in the park?

A food truck sold 8 times as many hamburgers as they sold hot dogs. If they sold 4 hot dogs, how many hamburgers did they sell?

My little brother has 10 red skittles and 2 green skittles. How many times as many red skittles does he have than green ones?

A pet store sold 2 cats. They sold 6 times as many dogs as they sold cats. How many dogs did they sell?

Vanessa read 25 books last summer. Mike read 5 books. How many times as many books did Vanessa read than Mike?

A number with more than 2 factors.

Which of the following sentences describe a comparison using multiplication?