Which entity generally initiates

15 Select the number from among the given options that can replace the question mark (?) in the following series.

24, 48, 51, 204, 209, ?

In the following question, a series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.

Select the number from among the given option that can replace the question mark (?) in the following series.

4, 21, 86, 261, 526, ?

Select the related number from the given alternatives.

29 : 65 : : 43 : ?

Find the missing number.

20, 30, 42, 56, 72, ?

Select the number that will replace the question mark (?) in the following series.

35, 38, 43, 50, 61, 74, ?

What will come in the place of question mark?

Find the missing term.

Find the missing term in the following series:

43 44 ? 69 185