The missing number (?) in the following series is : 3, 7, 15, 31, 63, ?

Find the missing number in the following number series. 3, 5, 8, 10, ?, 15, 18, 20

Find the missing number in the given series 7, 26, 63, 124, 215, 342, ?

Find the missing number in the given series 3, 4, 7, 11, 18, 29, ?

Find the missing number in the given series following the same pattern : 15, 20, 32, 62, 118, 248 ?

Find the missing number in the given series 6, 14, 36, 98, ?