Verbal Reasoning - Mental Ability Questions

In the following question, select the related letter pair from the given alternatives.PIR : OHQ : : ? : ?

A is D's brother. D is the son of Mrs. C. B is Mrs. C's father. How is A related to B?

Facing the East, Rahul turned left and walked 10m, then he turned to his left again and walked 10m. He then turned towards his right and went straight to cover 25m. In which direction is he from his starting point?

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
C A E, F D H, I G K, ?

In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it? a_c_e_b_de

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
A, C, F, H, K, ?

Find out the odd word/letters/number/number pair from the given alternatives.

Select the related word/letters/number from the given alternatives.
36 : 25 : : 100 : ?