Matrices

Bihar Board Class 12 · Mathematics · 84 past questions

19 of 84 · show all

1. Q4 2026 Set A2026 Set C2026 Set B2026 Set D

   If $A = [\,1\ \ 2\ \ 3\ \ 4\,]$ and $B = \begin{bmatrix} 1 \\ 2 \\ 3 \\ 4 \end{bmatrix}$ then $AB =$

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2. Q9 2026 Set E

   If $A = \begin{bmatrix}1 & 2 & 3 & 4\end{bmatrix}$ and $B = \begin{bmatrix}1\\2\\3\\4\end{bmatrix}$ then…

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3. Q12 2026 Set J2026 Set F2026 Set H

   If $A=[\,1\;\,2\;\,3\;\,4\,]$ and $B=\begin{bmatrix}1\\2\\3\\4\end{bmatrix}$ then $AB =$

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4. Q16 2025

   $[1\ {-2}\ 0]\begin{bmatrix} 3 \\ -2 \\ 11 \end{bmatrix} =$

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5. Q24 2025 Set A2025 Set E2023

   $\begin{bmatrix}6 & 5\end{bmatrix}\begin{bmatrix}1\\-1\end{bmatrix} =$

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6. Q25 2025 Set A2025 Set E20232023 Set E

   $\begin{bmatrix}2 & 3\\5 & 7\end{bmatrix}\begin{bmatrix}2\\5\end{bmatrix} =$

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7. Q26 2025 Set A2025 Set E

   $\begin{bmatrix}3 & -2\end{bmatrix}\begin{bmatrix}1\\-1\end{bmatrix}=$

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8. Q27 2025 Set A2025 Set E

   $\begin{bmatrix}4\end{bmatrix}\begin{bmatrix}2 & -2\end{bmatrix}=$

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9. Q28 2025 Set A2025 Set E

   $\begin{bmatrix}5&-1\\6&7\end{bmatrix}\cdot\begin{bmatrix}2&1\\3&4\end{bmatrix}=$

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10. Q30 2025 Set A

    $\begin{bmatrix}1&2\\3&4\end{bmatrix}\begin{bmatrix}1&0\\0&1\end{bmatrix} =$

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11. Q32 2025 Set A2025 Set E

    $\begin{bmatrix}1&2\\3&4\end{bmatrix}\begin{bmatrix}4&0\\0&4\end{bmatrix} =$

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12. Q34 2025 Set E20232023 Set E

    $\begin{bmatrix}1 & 0\\0 & 1\end{bmatrix}\begin{bmatrix}2 & -3\\0 & 4\end{bmatrix} =$

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13. Q41 2024 Set D

    $\begin{bmatrix}-3\\5\\2\end{bmatrix}\begin{bmatrix}1&6&-4\end{bmatrix}=$

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14. Q45 2024 Set J

    $\begin{bmatrix} -3 \\ 5 \\ 2 \end{bmatrix} \begin{bmatrix} 1 & 6 & -4 \end{bmatrix} =$

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15. Q50 2023

    $[-1][1\ \ {-1}] =$

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16. Q52 2023

    $\begin{bmatrix}13 & 15\\-1 & 4\end{bmatrix}\begin{bmatrix}2 & 0\\0 & 2\end{bmatrix} =$

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17. Q55 2023 Set E

    $[-1]\,[1\;\;-1] =$

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18. Q57 2023 Set E

    $\begin{bmatrix}13&15\\-1&4\end{bmatrix}\begin{bmatrix}2&0\\0&2\end{bmatrix} =$

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19. Q59 2023 Set E

    $[6 \;\; 5]\begin{bmatrix} 1 \\ -1 \end{bmatrix} =$

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