Identify the figure given in the options which when put

What will come in place of the question mark (?) in the following series?

21, 36, 66, 126, ?, 486

124, 180, 108, 198, ?, 220

30, 42, 54, 66, ?,  90

What should come in place of (?) question mark in the given number series.

5, 11, 23, 47, 95, ?

625, 125, 375, 75, 225, 45, ?

In each of the following series, one term is missing. Find the missing term.

2, 6, 15, 31, 56, ?

25     25     37.5     ?     328.125     1804.6875

31, 60, 118, 234, 466, ?

7.5% of 820.68 - 95% of 945.06 + 12.8% of 1050= ?

What will come in place of the question mark (?) in the following series?

12, 13, 27, ?, 329, 1646