In the sequence 4, 8, 12, 16, 20, 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 5, 10, 15, 20, 25, 30, how many times does the number 15 occur?

A. 1

In the sequence 100, 200, 300, 400, 500, how many times does the number 600 occur?

A. 0

In the sequence 5, 10, 15, 20, 25, how many multiples of 10 are present?

B. 3