Teachoo MCQ Test

Short Quiz - Chapter 4 Class 12 Determinants

Chapter 4 Class 12 Determinants | 5 questions

Timed test. Answer every question before time runs out. Correct answers and solutions appear after submission.
Time remaining 360
Question 1 of 5
Question 1 of 5
CBSE Board Exam 2024
Let \(\mathrm{A}=\left[\begin{array}{ll}\mathrm{a} & \mathrm{b} \\ \mathrm{c} & \mathrm{d}\end{array}\right]\) be a square matrix such that adj \(\mathrm{A}=\mathrm{A}\). Then, \((\mathrm{a}+\mathrm{b}+\mathrm{c}+\mathrm{d})\) is equal to :
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Question 2 of 5
CBSE Board Exam 2026
If \(\mathrm{A}(\operatorname{adj} \mathrm{A})=\left[\begin{array}{ccc}2026 & 0 & 0 \\ 0 & 2026 & 0 \\ 0 & 0 & 2026\end{array}\right]\), then the value of \(|\operatorname{adj} \mathrm{A}|\) is equal to :
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Question 3 of 5
CBSE Board Exam 2024
If \(\left|\begin{array}{ccc}1 & 3 & 1 \\ \mathrm{k} & 0 & 1 \\ 0 & 0 & 1\end{array}\right|= \pm 6\), then the value of k is :
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Question 4 of 5
If \(A=\left[\begin{array}{cc}3 & 1 \\ -1 & 2\end{array}\right]\), then \(14 A^{-1}\) is given by:
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Question 5 of 5
If \(A\) is an invertible matrix of order 2 , then \(\operatorname{det}\left(A^{-1}\right)\) is equal to
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