Question
If $1^2 = 1$, $11^2 = 121$, then $111^2 = ?$
This question was previously asked in
UPSSSC PET 2025 Question Paper (07-Sep-2025) (Shift-2)
The correct answer is
12321
The pattern for repunits (numbers like 1, 11, 111, …) follows: 1² = 1, 11² = 121, 111² = 12321, 1111² = 1234321 …
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