In the sequence 5, 10, 15, 20, 25, 30, how many times does the number 15 occur?

A. 1

In the sequence 1, 3, 5, 7, 9, 11, how many times does the number 4 occur?

C. 0

If the sequence is A, C, E, G, what is the next letter?

B. H

In the sequence 12, 14, 16, 18, 20, 22, how many times does the number 20 occur?

A. 1

In the sequence 3, 6, 9, 12, 15, 18, how many times does the number 6 occur?

A. 1