17, 17, 34, 20, 20, 31, 23, ... choose which pair of numbers comes next?

A. 26, 23

B. 34, 20

C. 23, 33

D. 27, 28

E. 23, 28

Answer: Option E

Solution(By Examveda Team)

This is an alternating subtraction series with repetition. There are two different patterns here. In the first, a number repeats itself; then 3 is added to that number to arrive at the next number, which also repeats. This gives the series 17, 17, 20, 20, 23, and so on. Every third number follows a second pattern, in which 3 is subtracted from each number to arrive at the next: 34, 31, 28.