Select the numbers from among the given options that can replace the question marks (?) in the following series.
83, 86, 91, 98, ?, 122, ?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 109, 139.
Given series: 83, 86, 91, 98, ?, 122, ?
83 + 3 = 86; 86 + 5 = 91; 91 + 7 = 98; 98 + 11 = 109; 109 + 13 = 122; 122 + 17 = 139