Select the number from among the given options that can replace the question mark (?) in the following series.
298, 217, 168, 143, ?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 134.
Given series: 298, 217, 168, 143, ?
The series follows this pattern:
298 - 81 = 217; 217 - 49 = 168; 168 - 25 = 143; 143 - 9 = 134