Mathematics · 2021
JEE Main · 24 February 2021, Shift 1 · Q84
Let M be any 3 × 3 matrix with entries from the set {0,1,2}. The maximum number of such matrices, for which the sum of diagonal elements of M^T M is…
Let M be any $\displaystyle 3 \times 3$ matrix with entries from the set $\displaystyle \{0,1,2\}$. The maximum number of such matrices, for which the sum of diagonal elements of $\displaystyle \mathrm{M}^{\mathrm{T}} \mathrm{M}$ is seven, is \_\_\_\_.
Official answer
540
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JEE Main 2021 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.