McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Bachelor of Arts in Economics (BA Economics) .
| 51. |
A mathematical statement setting two algebraic expressions equal to each other is called |
| A. | equation |
| B. | hypothesis |
| C. | inequality |
| D. | all the above |
| Answer» A. equation | |
| 52. |
An equation in which all variables are raised to the first power is known as |
| A. | linear equation |
| B. | non-linear equation |
| C. | quadratic equation |
| D. | polynomial of degree two |
| Answer» A. linear equation | |
| 53. |
The slope of a horizontal line is |
| A. | one |
| B. | zero |
| C. | two |
| D. | three |
| Answer» B. zero | |
| 54. |
The slope of a vertical line is |
| A. | one |
| B. | zero |
| C. | two |
| D. | undefined |
| Answer» D. undefined | |
| 55. |
An iso-cost line represents |
| A. | different combinations of two inputs that can be purchased with a given sum of money |
| B. | different combinations of two goods that can be purchased with a given income |
| C. | both (a) and (b) |
| D. | none of these |
| Answer» A. different combinations of two inputs that can be purchased with a given sum of money | |
| 56. |
(A+B)+C = A+(B+C). This law of matrices is known as |
| A. | cumulative law |
| B. | associative law |
| C. | distributive law |
| D. | identity law |
| Answer» B. associative law | |
| 57. |
(A+B) = (B+A). this law of matrices is known as |
| A. | cumulative law |
| B. | associative law |
| C. | distributive law |
| D. | identity law |
| Answer» A. cumulative law | |
| 58. |
k (A+B) = kA + kB. This law of matrices is known as |
| A. | cumulative law |
| B. | associative law |
| C. | distributive law |
| D. | identity law |
| Answer» C. distributive law | |
| 59. |
If in a matrix, the number if rows is the same as the number of columns, it is called |
| A. | singular matrix |
| B. | non-singular matrix |
| C. | square matrix |
| D. | column vector |
| Answer» C. square matrix | |
| 60. |
In a matrix, if there is only one row but any number of columns, it is called |
| A. | row matrix |
| B. | column matrix |
| C. | row vector |
| D. | both a & c |
| Answer» D. both a & c | |
| 61. |
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 |
| Answer» D. both b & c | |
| 62. |
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 |
| Answer» B. identity matrix | |
| 63. |
If the columns of a given matrix A and B are changed into rows and vice-versa, the matrix thus obtained is called the |
| A. | symmetric matrix |
| B. | transpose of a matrix |
| C. | singular matrix |
| D. | rank of a matrix |
| Answer» B. transpose of a matrix | |
| 64. |
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 |
| Answer» A. symmetric matrix | |
| 65. |
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 |
| Answer» C. singular | |
| 66. |
If the determinant formed by the elements of the matrix is not equal to zero, then the matrix is called |
| A. | skew symmetric |
| B. | symmetric |
| C. | singular |
| D. | non-singular |
| Answer» D. non-singular | |
| 67. |
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 |
| Answer» A. identity matrix | |
| 68. |
A inverse is defined only if A is a |
| A. | square matrix |
| B. | column vector |
| C. | orthogonal matrix |
| D. | skew-symmetric matrix |
| Answer» A. square matrix | |
| 69. |
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 |
| Answer» C. non-singular matrix | |
| 70. |
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 |
| Answer» D. both a & c | |
| 71. |
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 |
| Answer» A. diagonal matrix | |
| 72. |
Find the co-factor A23 of the matrix A = |
| A. | 23 |
| B. | 7 |
| C. | -23 |
| D. | -7 |
| Answer» D. -7 | |
| 73. |
A diagonal matrix whose diagonal elements are equal is called |
| A. | unit matrix |
| B. | singular matrix |
| C. | scalar matrix |
| D. | non-singular matrix |
| Answer» C. scalar matrix | |
| 74. |
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 |
| Answer» A. i > j | |
| 75. |
If A & B are symmetric matrices, then A + B is |
| A. | symmetric |
| B. | non-symmetric |
| C. | skew symmetric |
| D. | non-skew symmetric |
| Answer» A. symmetric | |
| 76. |
For any square matrix A of order ‘n’, A +AT is |
| A. | skew symmetric |
| B. | non-skew symmetric |
| C. | symmetric |
| D. | non-symmetric |
| Answer» C. symmetric | |
| 77. |
If matrix A is a matrix of order nxm and B is another matrix of order mxn, then BA will be the matrix of order |
| A. | nxm |
| B. | mxn |
| C. | nxn |
| D. | mxm |
| Answer» D. mxm | |
| 78. |
If A is a square matrix of order ‘n’ and I is the unit matrix of the same order, then AI is equal to |
| A. | a |
| B. | ia |
| C. | i |
| D. | both (a) & (b) |
| Answer» D. both (a) & (b) | |
| 79. |
If the ith raw and jth column of a square matrix of order ‘n’ are deleted, the determinant of the resulting square sub-matrix is called |
| A. | adjoint |
| B. | co-factor |
| C. | minor |
| D. | rank |
| Answer» C. minor | |
| 80. |
The signed minor of the matrix A is called |
| A. | adjoint |
| B. | co-factor |
| C. | minor |
| D. | rank |
| Answer» B. co-factor | |
| 81. |
The determinant of a matrix and that of its transpose are |
| A. | equal |
| B. | zero |
| C. | one |
| D. | negatively related |
| Answer» A. equal | |
| 82. |
If every element of a raw or column of a square matrix A is zero, then the value of the determinant is |
| A. | equal |
| B. | one |
| C. | zero |
| D. | not equal |
| Answer» C. zero | |
| 83. |
If each element of a raw or column is a sum of two elements, the determinant can be expressed as the |
| A. | sum of two determinants |
| B. | difference of two determinants |
| C. | multiplication of two determinants |
| D. | division of two determinants |
| Answer» A. sum of two determinants | |
| 84. |
A square matrix A such that A2 = A is called |
| A. | orthogonal matrix |
| B. | skew symmetric matrix |
| C. | idempotent matrix |
| D. | singular matrix |
| Answer» C. idempotent matrix | |
| 85. |
If A& B are symmetric matrix, then AB – BA is |
| A. | symmetric |
| B. | skew symmetric matrix |
| C. | idempotent matrix |
| D. | orthogonal matrix |
| Answer» B. skew symmetric matrix | |
| 86. |
The transpose of the cofactor matrix is called |
| A. | adjoint of the matrix |
| B. | power of a matrix |
| C. | minor of the matrix |
| D. | rank of a matrix |
| Answer» A. adjoint of the matrix | |
| 87. |
For any square matrix A of order ‘n’, A(Adj A) is equal to |
| A. | (adj a)a |
| B. | determinant a |
| C. | rank of a |
| D. | both a & b |
| Answer» D. both a & b | |
| 88. |
If AΠ B =Ø , then A and B are called |
| A. | disjoint set |
| B. | complement set |
| C. | unit set |
| D. | empty et |
| Answer» A. disjoint set | |
| 89. |
Y= a0+a1X is a function |
| A. | nonlinear |
| B. | proportional |
| C. | polynomial |
| D. | linear |
| Answer» D. linear | |
| 90. |
Relation between two numbers or variables are called |
| A. | function |
| B. | binary relation |
| C. | inverse relation |
| D. | none of the above |
| Answer» B. binary relation | |
| 91. |
If B is a subset of A , then A is a -------- of B |
| A. | super set |
| B. | sub set |
| C. | empty set |
| D. | universal set |
| Answer» A. super set | |
| 92. |
the elements in the horizontal line in a matrix is called |
| A. | columns |
| B. | rows |
| C. | elements |
| D. | diagonal |
| Answer» B. rows | |
| 93. |
If matrix A is of mxn dimension, then Atwill be --------- dimension |
| A. | nxm |
| B. | mxn |
| C. | nxp |
| D. | mxm |
| Answer» A. nxm | |
| 94. |
If A=At , then A is |
| A. | symmetric matrix |
| B. | skew symmetric matrix |
| C. | identity matrix |
| D. | orthogonal matrix |
| Answer» A. symmetric matrix | |
| 95. |
Given S1={a,b,c}S2={a,1,2}, then (S1-S2) Π (S2-S1) is |
| A. | 1 |
| B. | a |
| C. | b |
| D. | null set |
| Answer» D. null set | |
| 96. |
The set of “stars in the sky” is an example of |
| A. | countable set |
| B. | infinite set |
| C. | finite set |
| D. | unit set |
| Answer» B. infinite set | |
| 97. |
Ordered pairs of two sets are called |
| A. | elements |
| B. | function |
| C. | cartesian product |
| D. | none of the above |
| Answer» A. elements | |
| 98. |
AB=BA=I, then B is said to be -------- matrix of A |
| A. | adjoint |
| B. | inverse |
| C. | determinant |
| D. | cofactor |
| Answer» B. inverse | |
| 99. |
Determinant of triangular matrix is the product of |
| A. | diagonal elements |
| B. | off-diagonal elements |
| C. | rows |
| D. | columns |
| Answer» A. diagonal elements | |
| 100. |
If IAI=24. then the determinant of its transpose is |
| A. | 48 |
| B. | 0 |
| C. | 24 |
| D. | 42 |
| Answer» C. 24 | |
Done Studing? Take A Test.
Great job completing your study session! Now it's time to put your knowledge to the test. Challenge yourself, see how much you've learned, and identify areas for improvement. Don’t worry, this is all part of the journey to mastery. Ready for the next step? Take a quiz to solidify what you've just studied.