Which is not the total number of boys and girls

Question

in a 7th graded class the ratio of girls to boys is 3 : 5. Which of the following could NOT be the total number of boys and girls in class ? circle your answer and justify it below

A.) 24 B.) 35 C.) 40 D.) 32

Answer 1

The total number must be divisible by (3 + 5) = 8. The only number among the choices that is not divisible by 8 is 35, so the total cannot be 35. Answer (B) is correct.