Find the missing number?
2, 12, 30, ?, 90, 132

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

3 22 ? 673 2696 8093 

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

What value will come in the place of question mark in the following number series?
5 9 36 208 1398 ? 

Complete the following series.
12, 8, 14, 6, 16, ?

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
9, 17, 44, 108, 233, ?

In the following question, select the number which can be placed at the sign of question mark (?) from the given alternatives.
2460, 3570, 4680, ?

Which of the following numbers will replace the question mark in the given series?
65, 67, 69, 81, 93, ?