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

A. 1

In a group of 25 people, if Mark is 7th from the bottom, what is his rank from the top?

A. 18TH

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

A. 0

In a race of 50 runners, if Mark is ranked 15th from the top, what is his rank from the bottom?

A. 36TH

If two students, Sarah and Tom, swap their positions in a ranking of 40 students, and Sarah is currently 10th from the top, what will be her new rank from the bottom if Tom is 31st from the top?

B. 29TH