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Class/12/1MCQ Test/Matrices-Determinants/2022

Quiz by Vijay Kumar

Class XII
Mathematics
Central Board of Secondary Education

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10 questions
Show answers
  • Q1
    If a matrix has 8 elements, what are the possible numbers of orders?
    8
    6
    4
    5
    30s
  • Q2
    If the system of equations, x + 2y - 3z = 1, (k + 3) z = 3, (2k + 1) x + z = 0 is inconsistent, then the value of k is
    0
    2
    -3
    1.5
    30s
  • Q3
    For any square matrix A, AA' is a
    Skew symmetric matrix
    Unit matrix
    Diagonal matrix
    Symmetric matrix
    60s
  • Q4
    If the system of equations x + ay = 0, a z + y = 0 and a x + z = 0 has infinite solutions, then the value of a is
    No real value
    -1
    1
    0
    120s
  • Q5
    The matrix product AB = O, then
    A = O and B = O
    A is null matrix
    A = O or B = O
    None of these
    60s
  • Q6
    If I is a unit matrix, then 3I will be
    A triangular matrix
    None of these
    A scalar matrix
    A unit matrix
    60s
  • Q7
    . If area of triangle is 35 sq. units with vertices (2, - 6), (5, 4) and (k, 4). Then k is
    12, 2
    -2
    12
    12, -2
    180s
  • Q8
    If A, B are symmetric matrices of same order, then AB - BA is a
    Skew symmetric matrix
    Zero matrix
    Symmetric matrix
    Identity matrix
    120s
  • Q9
    Matrices A and B will be inverse of each other only if
    AB = BA = I
    AB = BA = 0
    AB = 0, BA = I
    AB = BA
    60s
  • Q10
    If the matrix A is both symmetric and skew symmetric, then
    None of these
    A is a zero matrix
    A is a diagonal matrix
    A is a square matrix
    60s

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