Verbal Reasoning - Mental Ability Questions

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

If 'P 3 Q' means 'P is daughter of Q', 'P 5 Q' means 'P is father of Q', 'P 7 Q' means 'P is mother of Q' and 'P 9 Q' means 'P is sister of Q', then how is J related to K in J 3 L 9 N 3 O 5 K?

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

In a certain code language, "DURING" is written as "GRUFQD". How is "PICKED" written in that code language?

If a = x, b = / and c = +, find the value of 7a5c1b6

In these questions, the relationship between two elements is shown in the statements. These statements are followed by two conclusions.
Statement:
Z < L < W = N = K < A
Conclusion:
I. A > L
II. Z = A

Findout the odd word/letters/number/number pair from the given alternatives.

Select the odd number from the given alternatives.