Verbal Reasoning - Mental Ability Questions

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

20 + 5 x 4 ÷ 7 - 2 = ?

A and B start from the same point. A cycles 10 km South, then turns to her right and cycles 9 km. B cycles 2 km North, then turns West and cycles 15 km, then turns to her left and cycles 12 km. Where is B with respect to A now?

In the following question, select the odd letter/letters from the given alternatives.

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
1, 7, 42, 210, 840, ?

From the given alternative words, select the word which cannot be formed using the letters of the given word:

EXPERIMENTAL

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

Matriculation, Intermediate, Graduate, ?

Parul cycles 3 km East, then turns South and cycles 1 km, then turns West and cycles 2.5 km, then turns to her right and cycles 1 km. Where is she now with reference to her starting position?

In the following question, from the given alternative words, select the word which cannot be formed using the letters of the given word.
Nightwalker