What letters will fill the blank?

Z, X, V, T, R, __,__

Find the missing term in the following question:­

In the following question, one term in the number series is wrong. Find out the wrong term.
3, 10, 27, 4, 16, 64, 5, 25, 125

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

6, 9 , 15, 24, 39, 63, ?

Which of the following doesn't fit into the series?
5-1-96, 27-1-96, 18-2-96, 12-3-96, 2-4-96.

Find the missing number in the following series.
27, 29, 33, ?, 57

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

5, 10, 13, 52, 57, ?

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

-1, 1, 4, 9, 16, ?

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series. 4, 13, 40, 121, ?