Verbal Reasoning - Mental Ability Questions

In a certain code language, '-' represents '+', '+' represents 'x', 'x' represents '÷' and '÷' represents '-'. Find out the answer to the following question.

10 + 20 x 10 ÷ 20 - 8 = ?

A boy is traveling towards the west. He turns to the right and then again turns to the left. In which direction is the boy facing now?

A is to the west of C. B is to the north-east of A and is equidistant from A and C. In which direction is B with respect to C?

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

L, O, Q, T, V, ?

P is the brother of Q. Q is the brother of R. P is the son of S. Based these three statements, much of the following statements cannot be definitely true?

Ratio of present ages of Pankaj and Punit is 5 : 6 and the sum of their ages is 33 years. What will be the difference (in years) of their ages?

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

A series is given, with one word missing. Choose the correct alternative from the given ones that will complete the series.
nephew, anther, tenses, prunes, preens, ?