Which of the following numbers will replace the question mark (?) in the given series?
20, 24, 33, ?, 107, 228, 397
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 58.
Given series: 20, 24, 33, ?, 107, 228, 397
The series follows this pattern:
20 + 22 = 20 + 4 = 24
24 + 32 = 24 + 9 = 33
33 + 52 = 33 + 25 = 58
58 + 72 = 58 + 49 = 107
107 + 112 = 107 + 121 = 228
228 + 132 = 228 + 169 = 397
So, the missing term in the series is 58.