Verbal Reasoning - Mental Ability Questions

Which of the following terms follows the trend of the given list?

YXXXXXX, YYXXXXX, YYYXXXX, YYYYXXX, YYYYYXX, _______________.

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

Start : End : : ? : ?

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

Grain : Warehouse :: Water

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

EJO : FKP : : KPU : ?

Seismography : Earthquake :: Taseometer : ?

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

CAR : RAC : : TYRE : ?

Select the word pair that is analogous to the given word pair.

Horse: Pony

Choose the correct alternative which will complete the following series:

21, 55, 19, 50, 17, 45, ?