Verbal Reasoning - Mental Ability Questions

The following equation is incorrect. Which two signs should be interchanged to correct the equation?

18 + 12 ÷ 9 - 30 x 16 = 10

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

Jailor : Prison :: Curator : ?

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

Entomology : Insects:: Seismology: ?

Select the related word from the given alternatives.

Alive : Dead :: Question : ?

Select the number missing from the given number series.

4, 9, 20, 44, ?

In a family, there are six members A, B, C, D, E and F. 

A and B are a married couple, A being the male member. D is the only son of C, who is the brother of A. E is the sister of D. B is the daughter-in-law of F, whose husband has died. How is F related to C ? 

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

GROUPS : ITQWRU : : SECOND : ?

Find the missing (?) in the series.

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