The process of separating lint from seed in cotton is

36      37       33      42       ?       51       15

500, 250, 750, 375, 1125, 562.5, ?

16.12 × 15.94 + 654.92 – 344.83 = ?× 5.95

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

25, 25, 5, 10, 2, ?

23, 39, 64, 100, ?, 213

115% of 800 - 4/5 of 320 + 82% of 700 = ? – 102% of 500

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

54, 81, 135, 216, 324, ?

12, 19, 33, ?, 117

31, 60, 118, 234, 466, ?

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

325, 292, 262, 229, ?, 166