Which figure should replace the question mark (?) if the following series were to be continued?

Analyzing the sequence of figures, the logical continuation is represented by Option 3.

A series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series.
CAT, DBT, ECT, ?
A series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series.
5 , 11 , 24 , 51 , 106 ,____?
The sum of the series (1 + 0.6 + 0.06 + 0.006 + 0.0006 + ....) is
Which of the following alternatives will replace the question mark?
Alpha, Beta, Gamma, Delta, ?
Select the option figure in which the given figure (X) is embedded (rotation is NOT allowed).

Which one number is wrong in the series? 126, 98, 70, 41, 14
Select the combination of letters that when sequentially placed in the blanks of the given series will complete the series.
q p _ r _ q r p _ r _ q _ p _ q
Which of the following alternative will fill the blanks?
m_u_mg_p_gu_
Which number is wrong in the given series? 1, 9, 25, 50, 81
Identify the figure given in the options which when put in place of ? will logically complete the series.

Choose the option which completes the given figure series.

Select the correct option that will fill in the blank and complete the series.
18, 36, 108, 432, 2160, .............Select the correct option that will fill in the blank and complete the series.
52, 56, 65, 81, 106, ?Select the correct option that will fill in the blank and complete the series. 21, 43, 85, 171, 341, .......
Select the correct option that will fill in the blank and complete the series.
3, 5, 7, 9, 11, ?
2, 2, 2, 2, 2, ?