In each of the following questions, a sequence is given, with one term missing. Choose the correct alternative from the given ones that will complete the series.
2, 3, 5, 9, 17, ?

Find the next number in the following number series?
31, 29, 24, 22, 17, ?

Which of the following numbers will replace the question mark in the given series?
3, 7, 22, 89 , ? 

Identify the correct option to complete the following series.
1, 3, 5, 11, 21, 43, 85, 171,___

In the following question, select the figure from the given alternatives in place of the question mark.

In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?
gh_i_hi_ig_ii_ _

18, 25, 23, 30, ?

Complete the following number series.
24, 60, 120, 210___