Verbal Reasoning - Mental Ability Questions

If "#" means "subtraction", "&" means "division", "@" means "addition" and "%" means "multiplication", then 315&3#9@4%6 = ?

In the following question, select the related word from the given alternatives.
Book : Pages : : Continent : ?

Select the related letters from the given alternatives.
DFI : ACF :: OQT : ?

Select the related word/letters/number from the given alternatives.
MUMBAI: UMBMIA :: GURUGRAM : ?

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.

200, 100, 50, 25, 12.5, 6.25, ?

If north-­west becomes south, north­-east becomes west and so on, then east will become which direction?

In the following question, select the related letters from the given alternatives.
PRAG : QTDK : : STOP : ?

In the following question, select the related letters from the given alternatives.
KLMN : IJKL : : TUVW : ?