Verbal Reasoning - Mental Ability Questions

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

BAAAAAA, AAAAAAB, ABAAAAA, AAAAABA, AABAAAA, _______________.

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

Seismology : Earthquake :: Hydrology : ?

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

HJ : NO : : BD : ?

Based on the analogy given, find the missing word from the given options.

Foot : Toes :: Hand : ?

Find the missing (?) in the series.

3, 5, 9, 11, ?, 33, 65,...

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

GROUPS : FQNTOR : : TORTURE : ?

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

G/MP : K/QT : : L/UX : ?

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

81 : 121 : : 49 : ?