• 3×1 A
• 1×3 B
• 3×3 C
• 1×1 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

• 3×2 A
• 2×3 B
• 2×2 C
• 3×3 D

• 40 A
• -40 B
• 26 C
• -26 D

• 
  A
• 
  B
• 
  C
• diagonal matrix 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

If A is a square matrix, then A - A^t is:

• 
  A
• 
  B
• 
  C
• 
  D

If each element of a 3 × 3 matrix A is multiplied by 3, then the determinant of the resulting matrix is:

• |A|³ A
• 27|A| B
• 3|A| C
• 9|A| D

• 5 A
• 14 B
• 20 C
• 6 D

• 1 A
• -5 B
• -1 C
• none D

A matrix of order m×1 is called:

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

• ab - cd = 0 A
• ac - bd = 0 B
• ad - bc = 1 C
• ad - bc = 0 D

If A is a square matrix, then:

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

The additive inverse of a matrix A is:

• A A
• A^-1 B
• - A C
• A² D

[0] is a:

• 
  A
• 
  B
• 
  C
• 
  D

If A = [aij] and B = [bij] are two matrices of same order r × s, then order of A - B is:

• r - s A
• r × s B
• r + s C
• none of these D

If the matrices A & B have the orders 2×3 and 5×2 then order BA is:

• 3×5 A
• 5×2 B
• 2×2 C
• none D

• 1 A
• -1 B
• -6 C
• 6 D

• 
  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