Verbal Reasoning - Mental Ability Questions

If "A" means "subtraction", "B" means "division", "C" means "addition" and "D" means "multiplication", then

294 B 6 A 30 C 31 D 4 = ?

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

Subhas Chandra Bose : Orissa :: Mahatma Gandhi : ?

Insert the missing character marked as '?'.

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

Mughals : History : : Rivers : ?

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

PHOTOGRAPHER : CAMERA : : WRITER : ?

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

Magazine : Editor :: Drama : ?

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

CAR : RAC : : TYRE : ?

Select the related word from the given alternatives.

Night : Stars :: Day : ?