Insert the missing number. 8, 7, 11, 12, 14, 17, 17, 22, (…)?

Question

Insert the missing number. 8, 7, 11, 12, 14, 17, 17, 22, (…)?

A. 22

B. 24

C. 20

D. 27

Answer: C. 20

Solution:

There are two alternate series in this question
(i). 8 , 11 , 14 , 17 , 20
(ii). 7, 12, 17, 22

The first series contains a difference of 3 and the second series contain a difference of 5. This is why the next number is “20”.

Read more:

What is the next number in the series 4, 2, 2, 3, 6?

Find the odd man out.2, 5, 10, 17, 26, 37, 50, 64