Verbal Reasoning - Mental Ability Questions

A is D's brother. D is the son of Mrs. C. B is Mrs. C's father. How is A related to B?

Select the related word/letters/number from the given alternatives.
GT : IV : : KX : ?

A man is facing east. He turns 60 degrees in the anticlockwise direction and then again turns another 120 degrees in the same direction. Which direction is he facing now?

In each question below are three statements followed by two conclusions numbered I and II. You have to take the three given statements to be true even if they seem to be at variance with commonly known facts and then decide which of the given conclusions logically follows from the three statements disregarding commonly known facts.
Statements:
All numbers are digits.
All alphabets are numbers.
All words are alphabets.
Conclusions:
I. All words are digits.
II. Some numbers are not words.

If 6#30=5; 8#24=3; 7#28=4; then what is the value of 8#40=?

If "S" denotes "multiplied by", "V" denotes "subtracted from", "M" denotes "added to" and "L" denotes "divided by", then

7 V 13 M 35 L 7 S 6 = ?

If 3 # 4 % 8 = 6 and 9 % 4 # 3 = 12, then 12 % 6 # 24 = ?

Choose the related word/letters/number from the given alternatives.
36 : 6 : : 441 : ?