Select the combination of letters that when sequentially placed in the blanks of the given series will complete the series.

_ Z _ C _ L Z _ C _ L _ X _ V L _ _ _ V

What will come in the place of question mark?
23, 93, 373, 1493, ?

Select the shape that will follow in the following series.

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
122, 197, 290, ?

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

10 : 90 :: 50 : ?

What value will come in place of question mark (?) in the number – series given below?

3 42 120 237 393 ?

Direction (66-70): What should come in place of the question mark(?) in the following number series?

4, 10, 22, 46, (?)

Find the missing (?) in the series.
14, 28, 42, 56, ? , 84, 98