Question

A series is given below, with one term missing. Choose the correct option from the given ones below that will complete the series

240, 122, 64, 36, 23, ?

1. 18.5
2. 18
3. 17
4. 19.5
5. 17.5

Answer 1

Correct Answer - Option 5 : 17.5

Calculation:

The pattern of the given series is:

⇒ (240 ÷ 2) + 2 = (120 + 2) = 122 

⇒ (122 ÷ 2) + 3 = (61 + 3) = 64

⇒ (64 ÷ 2) + 4 = (32 + 4) = 36

⇒ (36 ÷ 2) + 5 = (18 + 5) = 23

⇒ (23 ÷ 2) + 6 = ? = 17.5

∴ the missing number in the series is 17.5.