Most critical stage of irrigation in wheat crop

24 36 72 108 216 ?

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

206, 187, ?, 157, 146, 139

3, 8, 27, 124, ?

78, 80, 84, ?, 108, 140

58      83      133      ?       308       433

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

45, 54, 72, ?, 126, 162

44, 42, 46, 38, 54, ?

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

192, 96, 96, 144, ?, 720

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


75, 219, 388, ?, 809, 1065

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

5670, 1620, 540, 216, 108, ?