Verbal Reasoning - Mental Ability Questions

In a certain code language, '+' represents 'x', '-' represents '+', 'x' represents '÷' and '÷' represents '-'. What is the answer to the following question?

12 x 6 ÷ 5 + 4 = ?

In the following question, select the related number from the given alternatives.
48 : 63 : : 80 : ?

A man walks 3 km West, then turns South and walks 7 km, then turns East and walks 3 km, then turns to his right and walks 5 km. Where is he now with reference to her starting position?

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?

In a certain code language, '+' represents 'x', '-' represents '+', 'x' represents '÷' and '÷' represents '-'. What is the answer to the following question?

234 x 9 - 12 + 4 = ?

How many triangles are there in this geometric figure?

Sumit wants to get his clothes washed. The laundry service charges in his city are such that for the first kg of clothes, he is charged Rs.150 and after that, he is charged Rs.50 for every kg that follows. If he gets 10kg of clothes washed, how much money does he pay for the laundry service ?

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

-0.5, -0.35, -0.2, -0.05, ? , 0.25