Question # 1

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None of these

If A = {2m/m³= 8 , m€ Z} then A =

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{1,8,27}

{4}

(2,4,6}

{2,16,54}

In set builder notation the set {0, 1, 2, ............, 100} can be written as

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Identity w.r.t intersection in a power set of any set is

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∅

Set itself

Singleton set

{0}

If z1 = 2 + 6i and z2 = 3 + 7i then which expression defines the product of z1 and z2

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36 +(-32)i

-36+32i

6+(-11)i

0, +(-12)i

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A is proper subset of B

A is an improper subset of B

A is equivalent to B

B is subset of A

If x = 1/x for x ∈ R then the value of x is

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±1

0

2

4

The number of proper subset of A ={a.b.c.d} is

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3

6

8

15

The set {-1, 1} is closed under the binary operation of

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Addition

Multiplication

Subtraction

Division

If #n = (n-5)²+ 5, then find #3 x #4.

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54

12

4

9

A monoid (G, *) is said to be group if

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have identity element

is commutative

have inverse of each element

None of these

Let A,B, and C be any sets such that A∪B = A∪C and A∩B = A∩C then

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A≠ C

B = C

A = B

A≠ B

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Addition

Multiplication

Division

Both addition and multiplication

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n(A)

n(B)

0

1

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none of these

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none of these

Φset is the ______ of all sets?

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Subset

Union

Universal

Intersection

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Z is the set of integers, (z, *) is a group with a * b = a + b + 1, a, b∈G. then inverse of a is

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-a

a + 1

-2 -a

None of these

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-x

Infinite set

{-4, 4}

None of these

If A and B are two sets then any subset R of A x B is called

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relation on A

relation on B

relation from A to B

relation from B to A

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ECAT Mathematics Chapter 23 MCQs With Answers

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