CBSE 2025 · Region 5 · Set 1 · Q1 · 1 mark
If $\displaystyle \mathrm{A}=\left[\begin{array}{lll}5 & 0 & 0 \\ 0 & 5 & 0 \\ 0 & 0 & 5\end{array}\right]$, then $\displaystyle \mathrm{A}^{3}$ is :
Official answer
From CBSE’s own marking scheme for this paper.
(B)
$\displaystyle \left[\begin{array}{ccc}125 & 0 & 0 \\ 0 & 125 & 0 \\ 0 & 0 & 125\end{array}\right]$
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CBSE Class 12 Mathematics past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.