## Number System MCQs

1: If z1 = 2 + Î¹, z2 = 1 + 3Î¹, then Î¹ Re ( z1 – z2 ) =. Select the correct option .

A. 2

B. 1

C. Î¹

D. 2 Î¹

E. All of these

F. Both A and B

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

A. A âˆª (B âˆª C )

B. A âˆ© (B âˆª C )

C. A âˆª (B âˆª C )

D. Î

E. All of these

F. Both A and B

3: { – 3 n : n Îµ 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

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 Îµ A. select the correct option.

A. a * b â‰ 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, Î¹, – Î¹ } is group under multiplication, then inverse of – Î¹ is. Which of the following is a correct option according to the statement?

A. Î¹

B. 1

C. âˆ’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. Ï€

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 âˆ© B

B. A = B

C. A â‰ B

D. A âˆª 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 âˆª (B âˆª C )

C. A âˆª (B âˆª C )

D. Î

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