Solution: The sum of cubes formula is $\left(\frac{n(n+1)}{2}\right)^2$. For $n = 12$, the sum is $\left(\frac{12 \cdot 13}{2}\right)^2 = (78)^2 = 6084$. Dividing by 13: $6084 \div 13 = 468$ with remainder 0, since $13 \cdot 468 = 6084$.

Sat, 02 May 2026 19:38:49 +0000

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