Select the missing number of the given series. 30, 91, 274, 823, 2470, ?

Which number should replace the question mark (?) in the given series? 8, 10, 14, 20, 30, 44, ?, 90

Which number should replace the '?' in the given series? 8, 10, 14, 20, 30, 44, ?, 90

Select the missing number from the given series: 4, 3, 4, 7, 15, 38.5, ?

What should come in place of '?' in the given series? 24, 149, 213, 240, 248, ?

Select the missing number from the given series. 80, 78, 74, 66, 50, ?

What should come in place of the question mark (?) in the given series? 65, 57, 49, 41, 33, ?

What should come in place of the question mark (?) in the given series? 8, 16, 32, 56, ?, 128

Select the number from among the given options that can replace the question mark (?) in the following series. 12, 14, 18, 26, 42, ?