Number Series Questions

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

54, 51, 48, 45, 42, ?

A series is given, with one number missing. Choose the correct alternative from the given ones that will complete the series.
-4, ? , 1, 3.5, 6, 8.5

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.

8, 27, 125, 343, ?

A series is given, with one number missing. Choose the correct alternative from the given ones that will complete the series.

1, 0.25, 1/9, ? , 0.04, 1/36

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

A series is given, with one number missing. Choose the correct alternative from the given ones that will complete the series.
49, 64, ?, 100, 121

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.

15, 32, 99, 400, ?

A series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series:

3,4,7,?,18,29,47