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, ___?