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

5 , 10 , 17 , ? , 37 , 50 

20, 21, 19, 16, 17, 13, 14, 11, ?

7, 18, 40…….?....117, 172

3, 4, 7, 11, 18, 29, ?

Select the number that can replace the question mark (?) in the following series.
2807, 1400, 697, ?, 171, 84

In following question, a sequence is given, with one term missing. Choose the correct alternative from the given ones that will complete the series.
7, 12, 22, 42, 82, ?

Find the missing (?) in the series 13, 14, 18, 27, ?, 68, 104,?

Select the figure that will come next in the following figure series.