Softcopy is the intangible output, so then what is

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

32, ?, 30, 46, 28, 44

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

251, 272, 296, ?, 353, 386

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


75, 219, 388, ?, 809, 1065

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

15, 90, 450, ?, 5400, 10800 

44      45       41      50       ?       59       23

{(12√5 + 6√5 )} ×{(10√5 - 5√5 )} - 8² + 6² = ?

16, 20, 11, 27, ?, 38

13, 14, 23, 48, 97, 178, ?

120, 130, 145, 165, ?,  220

14, 86, 150, ?, 254, 294