Find the missing number in the following image.

Direction: In the following question, select the related letters from the given alternatives.
Doctor : Hospital :: Chef : ? 

If UNIVERSITY is 1273948756, how can TRUSTY be written in that code?

Which two numbers have to be interchanged to correct the given equation?
55 + 32 – 4 × ( 1 × 12 ) + ( 16 ÷ 4 ) =31

In the following question, find the related letters from the given alternatives.
SPAIN : USENT :: ? : LDTFT

A, is brother of B. C is mother of A.  B is granddaughter of D. and F is the son of A. what is relation of F to D?

Hari travelled 17 km. in the East, then he turned to the left and went 15 km ahead. Then he turned to the left and went 17 km. How far was he from the starting point now?