24, 536, 487, 703, 678, ?

So, 742 will come at the place of question mark.

18, 27, 49, 84, 132, (?)

So, ? = 193

33, 43, 65, 99, 145, (?)

So, ? = 203

7, 11, 23, 51, 103, (?)

The series is

7 + (41) = 11

11 + (43) = 23

23 + (47) = 51

51 + (413) = 103

103 + (421) = 187

So, ? = 103 + (421) = 187

5, 3, 6, ?, 64.75

5*0.5 + 0.5 = 3

3*1.5 + 1.5 = 6

6*2.5 + 2.5 = 17.5

17.5*3.5 + 3.5 = 64.75

So, 17.5 will come at the place of question mark.

8, 9, 20, 63, 256, 1285, ?

1015, 508, 255, 129, 66.5, ?, 20.875

3, 6, 12, 24, 48, 96, ?

The pattern is:

3 × 2 = 6

6 × 2 = 12

12 × 2 = 24

24 × 2 = 48

48 × 2 = 96

96 × 2 = 192

Hence Option A is correct

2, 16, 112, 672, 3360, 13440 , ?

4, 9, 19, ? , 79, 159, 319