Find the missing number in the series?

4, 18, ?, 100, 180, 294, 448

Find the next number in the given series. 9, 11, 15, 17, 21, 23, ?

6 6 8 5 5 3 7 3 7 2 5 8 8 7 8 1 5 5 3 Using the above sequence find the term that does NOT belong to the group. 83, 35, 27, 81

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series. 105, 130, 180, 255, ?

In the following question, select the missing number from the given series.672, 666, 660, 654, ?

In the following question, select the missing number from the given series. 23, 28, 34, 41, 49, ?

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

18, 29, 42, 53, ?,77

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

36, 18, 6, 3, 1, ?

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

256, ?, 190, 167, 148, 131