• 40 A
• -40 B
• 26 C
• -26 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 = [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

• 5 A
• -5 B
• -4 C
• 4 D

The trivial solution of the homogeneous linear equations is:

• (1, 0, 0) A
• (0, 1, 0) B
• (0, 0, 1) C
• (0, 0, 0) D

• 
  A
• diagonal matrix B
• 
  C
• 
  D

• 2 A
• -2 B
• 5 C
• -5 D

• 9 A
• -9 B
• -6 C
• none D

• 
  A
• 
  B
• 
  C
• 
  D

The additive inverse of a matrix A is:

• A A
• A^-1 B
• - A C
• A² D

• scalar matrix A
• diagonalmatrix B
• lower triangularmatrix C
• upper triangularmatrix D

• 
  A
• 
  B
• 
  C
• None D

The order of a matrix is shown by:

• 
  A
• number of columns + number of rows B
• number of rows × number of columns C
• number of columns - number of rows D

• scalarmatrix A
• diagonalmatrix B
• lower triangularmatrix C
• uppertriangularmatrix D

If any two rows of a square matrix are interchanged, the determinant of the resulting matrix:

• is zero A
• is multiplicative inverse of the determinant of the original matrix B
• is additive inverse of the determinant the original matrix C
• none of these D

If A is a square matrix, then:

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

• singular A
• non-singular B
• rectangular C
• null D

• 3×3 A
• 3×2 B
• 2×1 C
• 2×3 D

Two matrices X and Y are equal if and only if:

• X and Y are of same order A
• Their corresponding elements are equal B
• Both a and b C
• None of these 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