Which of the following options gives the correct

2807, 1400, 697, 346, 171, 84, 41, ?

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


28, 45, 75, 118, 174, ?

What value should come in the place of (?) in the following number series?

5670, 1620, 540, 216, 108, ?

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

2, 5, 14, 41, 122, 365, ?

252, 235, 220, 207, 196, ?

21, 37, 73, 137, ?, 381

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

63, 92, ?, 158, 195, 224

3.6 × 1.5 + 8.4 × 2.5 – 9.2 × 3.5 = ? – 9.2 × 4.4

Find the missing character.

1, 6, 27, 124, ?, 3906, 27391