Free MCQs & Online Quiz Practice for Exams

Q: The solution set of |-x| = 0 is ___________

A) [A]-1

B) [-1]

C) [0]

D) [ ]

Q: The solution set of 5-3x = -4 is_______

A) [3]

B) [1,3]

C) [-3]

D) [9]

Q: matrix [0 0 ; 0 0] is :

A) an identity matrix w.r.t multiplication

B) a column matrix

C) an identity matrix w.r.t addition

D) a row matrix

Q: The matrix [4 0 ; 0 -12] is:

A) a scalar matrix

B) 2x3 matrix

C) a diagonal matrix

D) None of these

Q: if A = [-1 -2 ; 3 1], then adj A is equal to :

A) [-1 - 2 ; 3 1]

B) [1 2 ; -3 -1]

C) [-1 2 ; 3 1]

D) [1 -2 ; 3 1]

Q: If A = [ 2 3 ; 3 4], then A⁻¹equals

A) [ 4 3 ; -3 2]

B) [ 4 -3 ; -3 2]

C) [ -2 3 ; 3 -4]

D) [ -4 3 ; 3 -2]

Q: For what value of d is the 2x2 matrix [ 5 1.5 ; 2 d], NOT inversible ?

A) -0.6

B) 0

C) 0.6

D) 3

Q: Suppose A and B are 2x5 matrices, Which of the following are the dimensions of the matrix A+B?

A) 2x5

B) 10x10

C) 7x1

D) 7x7

Q: Which of the following is the multiplicative inverse of [1 2 ; 0 1]

A) [1 2 ; 0 1]

B) [1 -2 ; 0 1]

C) [-1 2 ; 0 1]

D) [1 -2 ; 0 -1]

Q: Evaluate the determinant of the matrix [ 4 -1 ; -9 2]

A) 17

B) 1

C) -1

D) -17

Q: The additive inverse of √5 is

A) -√5

B) 1/√5

C) √-3

D) -5

Q: 2(3+4)=2x3+2x4, here the property used is

A) Commutative

B) Associative

C) Distributive

D) Closure

Q: √-1 x √-1 =

A) 1

B) i

C) -1

D) 0

Q: Which of the following represents numbers greater than -3 but less than 6?

A) { x :-3>x>6}

B) {x : -3 ≤ x ≤ 6}

C) { x :-3<x<6}

D) { x :-3≥x≥6}

Q: If n=8 and 16x 2ᵐ = 4ⁿ⁻⁸ , then m = ?

A) -4

B) -2

C) 0

D) 8

Q: (i). (-i) = ?

A) 1

B) -i

C) -1

D) i

Q: The multiplicative identity of real numbers is:

A) 0

B) 1

C) -1

D) R

Q: 0 is _____

A) a positive integer

B) a negative integer

C) neither positive nor negative

D) not an integer

Q: For i=√-1 , if 3i(2+5i) = x+6i, then x = ?

A) 5

B) -15

C) 5i

D) 15i

Q: √0 = ?

A) 0

B) 1

C) -1

D) not defined