First Year Mathematics Chapter 3 Online MCQ Test for 1st Year Mathematics Chapter 3 (Matrices and Determinants)

• scalar matrix A
• diagonalmatrix B
• triangularmatrix C
• none of these D

• 
  A
• 
  B
• 
  C
• 
  D

• 1 A
• -5 B
• -1 C
• none D

• 
  A
• diagonal matrix B
• 
  C
• 
  D

[0] is a:

• 
  A
• 
  B
• 
  C
• 
  D

If AB = BA = I, then A and B are:

• equal to each other A
• multiplicative inverse of each other B
• additive inverse of each other C
• both singular D

• 1 A
• -1 B
• -6 C
• 6 D

A matrix of order m×1 is called:

• row matrix A
• column matrix B
• identity matrix C
• scalar matrix D

If A is a matrix of order m × n and B is a matrix of order n × p then the order of AB is:

• p×m A
• p×n B
• n×p C
• m×p D

If A is a square matrix, then:

• |A^t| = A A
• |A^t| = -A B
• |A^t| = |A| C
• A^t= A D

If each element in any row or each element in any column of a square matrix is zero, then value of the determinant is:

• 0 A
• 1 B
• -1 C
• none of these D

If A = [a_ij], B = [b_ij] and AB = 0 then:

• A = 0 A
• B = 0 B
• either A = 0 or B = 0 C
• A & B not necessarily zero D

• 5 A
• -5 B
• -4 C
• 4 D

If A is a square matrix order 3 × 3 the |kA| equals:

• k |A| A
• k²|A| B
• k³ |A| C
• k⁴ |A| D

Minors and co-factors of the elements in a determinant are equal in magnitude but they may differ in:

• order A
• position B
• sign C
• symmetry D

• 
  A
• 
  B
• 
  C
• 
  D

• 
  A
• 
  B
• 
  C
• 
  D

If A and B are two matrices, then:

• A B = O A
• AB = BA B
• AB = I C
• AB may not be defined D

A matrix in which each element is 0 is called:

• 
  A
• 
  B
• 
  C
• 
  D

• 2 A
• -2 B
• 5 C
• -5 D