Question:

A square matrix in which all elements except those in diagonal are zero are called:

A.

diagonal matrix

B.

identity matrix

C.

null matrix

D.

none

Answer» a. diagonal matrix

Question:

In …………………… sets, the number of elements in the two sets is equal.

A.

null

B.

equivalent

C.

singleton

D.

zero

Answer» b. equivalent

Question:

The value of ‘x’ in 3x – 4 = 7 is

A.

1

B.

11/3

C.

3/11

D.

7/12

Answer» b. 11/3

Question:

A polynomial can have:

A.

constants

B.

variables

C.

exponents

D.

all the above

Answer» d. all the above

Question:

A positive definite Hessian fulfils the second-order conditions for

A.

maximum

B.

minimum

C.

both maximum and minimum

D.

minimax

Answer» b. minimum

Question:

The degree of polynomial is

A.

0

B.

2

C.

1

D.

3

Answer» c. 1

Question:

Example of linear equation involving two variables is

A.

7x+3y+4z = 20

B.

6x+2y = 10

C.

8x = 2+10

D.

7a+8b+9c = 10+5

Answer» b. 6x+2y = 10

Question:

An adjoint matrix is the ……………… of the cofactor matrix.

A.

inverse

B.

minor

C.

cofactor

D.

transpose

Answer» b. minor

Question:

A ∪ B = B∪ A and A ∩ B= B ∩ A is known as

A.

de morgan’s law

B.

distributive law

C.

associative law

D.

commutative law

Answer» d. commutative law

Question:

The highest degree of the variables in an equation determines the nature of the equation.

A.

lowest degree

B.

highest degree

C.

value

D.

solution

Answer» b. highest degree