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

A. 1

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

A. 0

B is 5th from the top and C is 8th from the bottom in a group of 20 people. What is C's rank from the top?

C. 11TH

In the sequence 12, 15, 18, 21, 24, how many times does the number 21 occur?

A. 1

In a race of 15 participants, D is ranked 3rd from the top and E is ranked 4th from the bottom. If D and E swap their positions, what will be D's new rank from the bottom?

B. 11TH