Top 150+ Solved Mathematics for Economic Analysis 1 MCQ Questions Answer
Q. If all the elements of a matrix of any order are zero, it is called
a. identity matrix
b. null matrix
c. zero matrix
d. both b & c
Q. A square matrix with 1’s in its principal diagonal and zeros everywhere else is
a. diagonal matrix
b. identity matrix
c. leading diagonal
d. scalar matrix
Q. If the columns of a given matrix A and B are changed into rows and vice-versa, the matrix thusobtained is called the
a. symmetric matrix
b. transpose of a matrix
c. singular matrix
d. rank of a matrix
Q. A square matrix A, such that A = A’, is called a
a. symmetric matrix
b. skew-symmetric matrix
c. singular matrix
d. rank of a matrix
Q. If the determinant formed by the elements of the matrix A is equal to zero, then the matrix is
a. skew symmetric
b. symmetric
c. singular
d. non-singular
Q. If the determinant formed by the elements of the matrix is not equal to zero, then the matrix iscalled
a. skew symmetric
b. symmetric
c. singular
d. non-singular
Q. The matrix A multiplied by its inverse will be a
a. identity matrix
b. skew-symmetric matrix
c. idempotent matrix
d. adjoint of a matrix
Q. A inverse is defined only if A is a
a. square matrix
b. column vector
c. orthogonal matrix
d. skew-symmetric matrix
Q. the sufficient condition required for the matrix to possess inverse is that the matrix should be
a. square matrix
b. singular matrix
c. non-singular matrix
d. orthogonal matrix
Q. which method is used for finding inverse of a matrix
a. gauss elimination method
b. henrich standard method
c. co-factor method
d. both a & c
Q. A matrix with all elements zero other than all the diagonals is called
a. diagonal matrix
b. orthogonal matrix
c. unit matrix
d. column vector
Q. A diagonal matrix whose diagonal elements are equal is called
a. unit matrix
b. singular matrix
c. scalar matrix
d. non-singular matrix
Q. A square matrix A of order mxn is called an upper triangular matrix if aij = o for all
a. i > j
b. i < j
c. i = j
d. all of the above
Q. If A & B are symmetric matrices, then A + B is
a. symmetric
b. non-symmetric
c. skew symmetric
d. non-skew symmetric