Question - Look carefully for the pattern, and then choose which pair of numbers comes next.
17 17 34 20 20 31 23
A. 26 23
B. 34 20
C. 23 33
D. 27 28
E. 23 28
Answer -
Option E
Explanation:
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.