Select the number from among the given options that can replace the question mark (?) in the following series.
17, 20, 80, 85, ?, 517
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 510.
| Understanding |
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Given series: 17, 20, 80, 85, ?, 517 The series follows the pattern: 17 + 3 = 20 20 × 4 = 80 80 + 5 = 85 85 × 6 = 510 510 + 7 = 517 So, the missing term in the series is 510. |