Question - Look carefully for the pattern, and then choose which pair of numbers comes next.
9 11 33 13 15 33 17
A. 19 33
B. 33 35
C. 33 19
D. 15 33
E. 19 21
Answer -
A
Explanation:
In this alternating repetition series, a random number, 33, is interpolated every third number into a simple addition series, in which each number increases by 2.