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

A. 1

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

B. 1

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

A. 1

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

A. 1

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

A. 1