## Question

**What is next number 1, 7, 17, 23, 33, ____?**

A. 37

B. 39

C. 41

D. 43

**Answer: B. 39**

**Solution:**

7 – 1 = 6

17 – 7 = 10

23 – 17 = 6

33 – 23 = 10

So, are you able to see that numbers 6 & 10 are reoccurring.

Then; the next number will be

33 + 6 = 39

**Hence, the 39 is your answer.**

**Read more:**

**What is the next number in this series: 2, 6, 15, 40, 145, ___?**