In a race of 15 participants, if Sam is 3rd from the top and 13th from the bottom, how many participants are there in total?

A. 15

In a group of 40 people, if Tom is 10th from the bottom, what is his rank from the top?

B. 30TH

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

A. 1

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

A. 1

In a race of 40 participants, E is ranked 12th from the top. If E swaps positions with F, who is ranked 15th from the bottom, what will be E's new rank from the top?

D. 14TH