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Short Quiz - Chapter 3 Class 12 Matrices

Chapter 3 Class 12 Matrices | 5 questions

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Question 1 of 5
Question 1 of 5
CBSE Board Exam 2026
If a square matrix A is such that \(\mathrm{A}^{2}=\mathrm{A}\) and \((\mathrm{I}-\mathrm{A})^{3}=\mathrm{xA}+\mathrm{I}\), then value of \(x\) must be :
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Question 2 of 5
CBSE Board Exam 2024
Assertion (A) : Every scalar matrix is a diagonal matrix.
Reason (R) : In a diagonal matrix, all the diagonal elements are 0 .
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Question 3 of 5
CBSE Board Exam 2026
If \(\mathrm{A}^{2}=4 \mathrm{~A}+3 \mathrm{I}\) and \(\mathrm{A}^{-1}=\mathrm{xA}+\mathrm{yI}\), then the value of \((\mathrm{x}+\mathrm{y})\) is :
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Question 4 of 5
CBSE Board Exam 2024
If \(A=\left[a_{i j}\right]\) is an identity matrix, then which of the following is true ?
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Question 5 of 5
CBSE Board Exam 2025
Which of the following can be both a symmetric and skew-symmetric matrix?
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Try to answer one MCQ within 90 seconds.