Verbal Reasoning - Mental Ability Questions

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 ? 

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

294 B 6 A 30 C 31 D 4 = ?

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

ZYXYXYXY, XWXYXYXY, XYZYXYXY, XYXWXYXY, XYXYZYXY, ______.

Pointing to an old man, Kailash said, "His son is my son's uncle." How is the old man related to Kailash ? 

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

Exactly : Precisely :: Evidently : ?

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

Iron Man Of India : Sardar Vallabhbhai Patel : : Father of the Nation : ?

In the following question, select the related word pair from the given alternatives.

Lion : Den : : ? : ?

In the following question, select the related number from the given alternatives.

43 : 70 : : 94 : ?