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

A. 1

In the sequence 2, 4, 6, 8, 10, 12, how many times does the number 8 occur?

A. 1

In the sequence 1, 3, 5, 7, 9, 11, how many times does the number 6 occur?

B. 0

In the sequence 2, 4, 6, 8, 10, 12, how many times does the number 8 occur?

A. 1

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

A. 1