Question:

Given A in 2×2 and B is 2×4, then the matrix AB will be of the order

A.

2×2

B.

2×4

C.

4×2

D.

1×2

Answer» b. 2×4

Question:

The determinant of a quadratic form is called

A.

jacobian determinant

B.

hessian determinant

C.

discriminant

D.

none of these

Answer» c. discriminant

Question:

in a square matrix, the elements lie from left top to right bottom is

A.

diagonal elements

B.

row elements

C.

column elements

D.

triangular elements

Answer» a. diagonal elements

Question:

A variable which is free to take any value we choose to assign to it is called

A.

dependent variable

B.

independent variable

C.

endogenous variable

D.

explained variable

Answer» b. independent variable

Question:

the elements in the horizontal line in a matrix is called

A.

columns

B.

rows

C.

elements

D.

diagonal

Answer» b. rows

Question:

If we are told that the two statements ‘y = 3x’ and ‘y = x + 10’ are both true at the same time, theyare called

A.

implicit functions

B.

explicit functions

C.

simultaneous equations

D.

quadratic equations

Answer» c. simultaneous equations

Question:

If a set has three elements, then its power set consist of —– elements

A.

3

B.

5

C.

6

D.

8

Answer» d. 8

Question:

A negative definite Hessian fulfills the second order conditions for

A.

maximum

B.

minimum

C.

both maximum and minimum

D.

minimax

Answer» a. maximum

Question:

A consumer’s income or budget is 120. She buys two goods, x and y, with prices 3 and 4respectively. Then the budget constraint can be expressed as

A.

4x + 3y = 120

B.

3x + 4y = 120

C.

12x + 12y = 120

D.

cannot be determined

Answer» b. 3x + 4y = 120

Question:

Maximum number of linearly independent rows and columns of a matrix is called

A.

rank

B.

adjoint

C.

determinant

D.

inverse

Answer» a. rank