Complete the series: 1, 9, 25, 49, ______, 121.
- 92
- 61
- 71
- 81
Explanation
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
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