Complete the following series with the correct option : 3, 2, 6, 8, 18, 40, ?

8th term of the following series will be : 2, 6, 18, 54, ...

Replace the question mark (?) in the following number series with suitable option: 3, 3, 4.5, 9, 22.5, ?

Which number will come next in the following series? 8, 15, 28, 53, ?

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

Which term is wrong in the following series? 8, 13, 21, 32, 47, 63, 83