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 = ?

Select the number which can be placed at the place of ? in the following question

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

8,21,60,177,?

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
A, E, I, M, ?

A is in the east of B, who is in the east of Q. If Q is in the south of P, then in which direction of A, is P?

Select the missing number from the given responses.

What will come in place of the question mark (?) in the following number series?14, 18, 9, 25, 0, ?

A series is given, with one number missing. Choose the correct alternative from the given ones that will complete the series.
6, 18, 54, ? , 486, 1458