### 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?**