PYQ Vault

Day 211: CBSE Class 12 Maths

5 questions. Try each one first, then open its answer.

  1. Question 1

    Linear Programming. Asked once: 2023 (same type asked 4 times)

    18
    The number of corner points of the feasible region determined by the constraints x−y≥0x - y \ge 0, 2y≤x+22y \le x + 2, x≥0x \ge 0, y≥0y \ge 0 is :

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  2. Question 2

    Matrices. Asked once: 2025 (same type asked 4 times)

    9
    Let A be a matrix of order m×nm \times n and B is a matrix such that ATBA^TB and BATBA^T are defined. Then, the order of B is :

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  3. Question 3

    Matrices. Asked once: 2025 (same type asked 4 times)

    8
    Which of the following can be both a symmetric and skew-symmetric matrix ?

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  4. Question 4

    Matrices. Asked once: 2024 (same type asked 4 times)

    4
    If A=[31−12]A = \begin{bmatrix} 3 & 1 \\ -1 & 2 \end{bmatrix} and A2+7I=kAA^2 + 7I = kA, then the value of k is :

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  5. Question 5

    Matrices. Asked once: 2023 (same type asked 4 times)

    4
    If A=[aij]A = [a_{ij}] is a square matrix of order 2 such that aij={1,when i≠j0,when i=ja_{ij} = \begin{cases} 1, & \text{when } i \ne j \\ 0, & \text{when } i = j \end{cases}, then A2A^2 is

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