## Number System MCQs

1: If z1 = 2 + ι, z2 = 1 + 3ι, then ι Re ( z1 – z2 ) =. Select the correct option .

A. 2

B. 1

C. ι

D. 2 ι

E. All of these

F. Both A and B

2:Given function is equal to (A ∪ B) ∪ C =

A. A ∪ (B ∪ C )

B. A ∩ (B ∪ C )

C. A ∪ (B ∪ C )

D. Π

E. All of these

F. Both A and B

3: { – 3 n : n ε Z } IS an abelian group under ______________.

Select anyone

A. subtraction

B. addition

C. division

D. multiplication

E. E. All of these

F. F. Both A and B

4: A function from A to B is called onto function if its range. Select the correct option.

A. A

B. B

C. Neither A nor B

D. Both A and B

E. All of these

F. Both C and B

5: Function f = { (x,Y) | Y = mx + c } is called ____________.

A. linear function

B. quadratic function

C. constant function

D. cubic function

E. All of these

F. Both A and B

6: * is said to be commutative in A for all a, b ε A. select the correct option.

A. a * b ≠ b * a

B. a + b = b + a

C. a * b = b * a

D. a – b = b – a

E. All of these

F. Both A and B

7: Graph of the linear function represents which of the following.

A. parabola

B. triangle

C. circle

D. straight line

E. All of these

F. Both A and B

8: If G = { 1, -1, ι, – ι } is group under multiplication, then inverse of – ι is. Which of the following is a correct option according to the statement?

A. ι

B. 1

C. −1

D. None of Above

E. An All of these

F. Both C and B

9: Identity element of a set X with respect to intersection in P(X) is called _______________.

A. 0

B. X

C. π

D. does not exist

E. All of these

F. Both C and B

10: Extraction of a square root of a given number is called _____________.

A. binary operation

B. unary operation

C. relation

D. relation in some set

E. All of these

F. Both C and B

11: Which of the following is unary operation?. Select the correct option.

A. square root

B. addition

C. multiplication

D. None of Above

E. All of these

F. Both C and B

12: Union of two sets A and B is called _________.select the correct option.

A. A ∩ B

B. A = B

C. A ≠ B

D. A ∪ B

E. All of these

F. Both C and B

13: A function whose range consists of just one element is called is___________. Which of the following is correct.

A. identity function

B. onto function

C. one-one function

D. constant function

E. All of these

F. Both A and B

14: The given function is equal to. (A n B) n C =

A. A ∪ (B ∪ C )

B. A n (B n C )

C. A ∪ (B ∪ C )

D. Π

E. All of these

F. Both A and B

15: Even integer is also called ___________

A. Natural number

B. Irrational number

C. Whole number

D. Rational number

E. All of these

F. Both A and B