What should come in place of the question mark (?) in the following series?
1,17, 33, 49, 65 ,?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 81.
Given series: 1,17, 33, 49, 65 ,?
1 + 16 = 17; 17 + 16 = 33; 33 + 16 = 49; 49 + 16 = 65; 65 + 16 = 81