Verbal Reasoning - Mental Ability Questions

Find the next number in the series given 18, 90, 450, 2250, ?

Select the related word/letters/number from the given alternatives.

Honest : Truthful : : Obdurate : ?

Select the related word/letters/number from the given alternatives.

IJKL: PQRS : : EFGH : ?

Select the related word from the given alternatives.

Alive : Dead :: Question : ?

Select the related word/letters/number from the given alternatives.

36 : 12 : : 72 : ?

In the following question, select the related number from the given alternatives.

553 : 551 : : 447 : ?

Find the next term in the series

X, V, T, R, P, ?

Select the related word/letters/numbers from the given alternatives:

9 : 25 :: 49 : ?