Identify the incorrect number in the sequence: 1, 9, 27, 49, 81, 121?
- 9
- 27
- 49
- 81
Explanation
Pattern is square of odd numbers:
1^2 = 1
3^2 = 9
5^2 = 25
7^2 = 49
9^2 = 81
11^2 = 121
Given sequence has 27 instead of 25.
Incorrect number is 27.
Last verified on 22-10-2026
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