Direction (66-70): What should come in place of the question mark(?) in the following number series?

4    6    14    44  ?   892

Direction : What should come in place of the question (?) in the following question.

15  34    20   ?   25    43  30

The average of five terms is 40. If the first four terms are given as 50, 52, 35 and 46, find the fifth term.

What will come in place of question mark ( ? ) in the following series?
13, 25, 61, 121, 205, ? 

What will come in place of the question mark (?) in each of the following series?

15     18    16   19     17    20    ?

Direction (66-70): What should come in place of the question mark(?) in the following number series?

10    11    13    21    69    ?

What should come in place of the question mark '?' in the following number series?

46, ?, 284, 345, 378, 391