In the sequence 12, 15, 18, 21, 24, how many numbers are divisible by 3?

D. 5

What letter should come next in the series: A, C, E, G, I, ?

B. J

What is the next letter in the series: A, E, I, M, ?

A. O

In the series A, C, E, G, I, what is the 4th letter?

A. G

What is the next letter in the series: K, M, O, Q, ?

A. R