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

In the sequence 1, 3, 5, 7, 9, 11, 13, how many times does the number 10 occur?

A. 0

In the sequence 4, 8, 12, 16, 20, 24, how many times does the number 20 occur?

A. 1

In the sequence 7, 14, 21, 28, 35, 42, how many times does the number 28 occur?

A. 1