Verbal Reasoning - Mental Ability Questions

What should be replaced in the place of '?' in the following series ?

QAR, RAS, SAT, TAU, ?

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

12 : 60 : : 28 : ?

If x means -, / stands for +, + stands for /, and - stands for x, which of the following gives 125 - 50 / 10 + 20 x 4 ?

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

Five Point Someone : Chetan Bhagat : : Swami and Friends : ?

In the following question, select the missing number from the given series.

9, 9, 18, 54, 216, ?

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

EGIK : FILO :: FHJL : ?

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

989 : 26 :: 868 : ?

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

QPQPQRPQP, QPQPRQPQP, QPQRPQPQP, QPRQPQPQP, QRPQPQPQP, _______________.