Verbal Reasoning - Mental Ability Questions

There are five students - P, Q, R, S and T having different heights in a class. P's height is more than only one student. Q's height is more than S and P
but not more than R. S's height is more than P. R is not the smallest. Who is having the maximum height in the class?

Ms. X's husband is the only son of Ms. Y's mother. If Ms. X's brother and Ms. Y's husband are cousins, then Ms. X is Ms. Y's ____.

In the following question, by using which mathematical operator will the expression become correct?
18 ? 6 ? 9 ? 27

Among four books, Book1 is twice as heavy as Book 2. Book 3's weight is half of Book 2's weight. Book 4 is 60 grams more as compared to Book 2 but 60 grams less as compared Book 1. Which book is heaviest?

If IMPLORE is coded as GKNJMPC, then how will HUB be coded as?

In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?
efg _ _ eff _ ghhe _ eff _ gggh _ h

Rampal told Arjun, "Yesterday I defeated the only brother of the daughter of my grandmother." Whom did Rampal defeat?

Two angles whose sum is 90 are