If GIVE is coded as 5137 and BAT is coded as 924, how will GATE be coded in the same code?

Which of the following answer figure will complete the series of question figure?

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

Complete the following number series.
6, 10, 18, 34 ?

Find the missing number?
15, 31, 64, 131, ?

Select the correct option that will fill in the blank and complete the series.
3, 9, 36, 180, ?

A Person going to market for shopping and start walking from home 12 km east and reaches point M. From point M he takes left turn and walks 4 km and then he takes right turn and walked 6 km and again he takes right turn and walks 7 km and again takes right turn and reaches point N. If it is given that point M is in north from point N, then what is the distance between M and N? 

Raju is 10th from the top and Ravi is 21st from the bottom. There are 3 students between them. How many total students are there in the class?