Which of the following statements are true

Find the number of positive three-digit even integers whose digits are among 9, 8, 7,5, 3, and 1.

I’m stuck on this equation, anyone got the answer?

Compare the following pair of numbers a and b in three ways. a. find the ratio of a to b. b. find the ratio of b to a. c. complete the sentence: a is percent of b. a=120 and b=340 a. the ratio of a to b is . b. the ratio of b to a is . c. a is nothing percent of b.