Number Series Questions

In the following question, select the missing number from the given series.

42, 21, 21, ?, 63, 157.5

In the following question, select the missing number from the given series.

24, 26, 28, ?, 32, 34

In the following question, select the missing number from the given series.

12, 17, 34, ?, 78, 83, 166

In the following question, select the missing number from the given series.

57, 54, 48, 39, ?, 12

In the following question, select the missing number from the given series.

10, 12, 14, 16, 18, ?

Which number will complete the series?

0,1,4,15,?,325,1956

In the following question, various terms of an alphanumerical series are given with one or more terms missing as shown by (?).Choose the missing terms out of the given alternatives. 2Z5, 7Y7, 14X9, 23W11, 34V13, ?

In the following question, select the missing number from the given series.

13, 17, 26, 42, 67, ?