Verbal Reasoning - Mental Ability Questions

In the following question, select the related word pair from the given alternatives.

Square : Four : : ? : ?

In the following question, select the related word from the given alternatives. Vacant : Empty : : Dearth : ?

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

59 : 68 : : ? : ?

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

31 : 42 : : ? : ?

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

DCEF : QPRS :: XWYZ : ?

In the following question, select the related letter/letters from the given alternatives.

PGY : JAS : : VIK : ?

Find the correct option which has a similar relationship.

Reactants : Products :: H2 + O2 : ?

Select the correct set of symbols which will fit in the given equation?

5  0  3  5 = 20