Verbal Reasoning - Mental Ability Questions

In a certain code language, 'x' represents '+', '÷' represents 'x', '-' represents '÷' and '+' represents '-'. Find out the answer to the following question.
 
15 x 4 ÷ 35 - 70 + 16 = ?

Rajiv is the brother of Arun. Sonia is the sister of Sunil. Arun is the son of Sonia. How is Rajiv related to Sunil?

In the following series, one letter is missing as shown by the ?. Select the missing letter from the given options.

Q, N, K, H, ?

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

Inch, Decameter, Foot, ?

Two Person P an d Q ar e separ ated by a distan ce of 20 meterin west-east direction respectively. Now P and Q startwalking in north and south direction respectively and walkedfor 5 meter. Now P and Q took a right turn and walked 10meach . Now P an d Q took left tur n an d aft er walkin g 5 meterboth of them stopped. Find the distance between them

I go 5 km East, then turn right and go 8km. Then I turn left and go 5 km and then I turn left and go 8 km. At what distance am I from the starting point?

A paper boy cycles 10 km East, then turns South and cycles 3 km, then turns West and cycles 6 km, then turns to his right and cycles 3 km. Where is he now with reference to his starting position?

If 23 x 16 = 184, 37 x 10 = 185, then 85 x 12 = ?