The pattern of the series appears to be square numbers: 1 = 1^2 9 = 3^2 25 = 5^2 49 = 7^2 81 = 9^2 121 = 11^2 So, the correct completion of the series would be: 1, 9, 25, 49, 81, 121
Complete the series: 1, 9, 25, 49, ______, 121.
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Question context
This question is part of 🧩 Logical Reasoning within the broader 🧠 Aptitude Mastery subject and appears in the ASF Airports Security Force preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.