The premiums collected are held in trust by the

3, 8, 27, 124, ?

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

54, 81, 135, 216, 324, ?

18,  37,  60, ?,  120,  157

70, 69, 73, 64,80, 55, ?

97, 75, 108, 64, ?, 53

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

15, 90, 450, ?, 5400, 10800 

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

?, 65, 37, 73, 29, 81

Find the missing number in the given number series.

2, 5, 11, 23, 47, ?

250, 279, 311, 349, 396, ?

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

40, 25, 30, 50, 105, ?