In a class of 30 students, John is ranked 8th from the top. What is his rank from the bottom?

B. 23RD

In a race of 50 runners, Mark is in 15th position. If he swaps places with the runner in 20th position, what will be Mark's new rank from the top?

D. 16TH

In a school of 40 students, Tom is ranked 17th from the top. How many students are ranked below him?

B. 23

If two students, Mark and Lisa, interchange their seats, Mark is now 5th from the top and Lisa is 10th from the bottom. How many students are there in total?

C. 16

In a class of 30 students, A is ranked 10th from the top. What is A's rank from the bottom?

B. 20TH