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ECAT Pre General Science Mathematics Chapter 2 Set, Functions and Groups Online Test MCQs With Answers
Question # 1
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4
3
2
1
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Question # 2
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none of these
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Question # 3
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Question # 4
The set of natural numbers is a subset of
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{1, 2, 3, .... 100}
The set of whole numbers
{2, 4, 6, 8, .....}
None of these
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Question # 5
For any set X, X∪X is
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X
X'
Φ
Universal Set
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Question # 6
(A ∩ B)c =
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A∩ B
(A ∪ B)c
Ac∪Bc
Φ
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Question # 7
The set of even prime numbers is
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(2,4,6,8,10}
{2,4,6,8,10,12}
{1,3,5,7,9}
{2}
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Question # 8
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Question # 9
If A = {2m/m
3
= 8 , m€ Z} then A =
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{1,8,27}
{4}
(2,4,6}
{2,16,54}
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Question # 10
Additive inverse of -a -b is
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a
-a + b
a - b
a + b
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Question # 11
{1, 2, 3} is _____
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an infinite set
A finite set
A singleton set
Universal set
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Question # 12
The set of natural is a semi group w.r.t
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Addition
Division
Subtraction
None of these
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Question # 13
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Addition
Multiplication
Division
Both addition and multiplication
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Question # 14
The geometrical representation of a linear function is
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Circle
Parabola
Straight lie
None of these
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Question # 15
The extraction of cube root of a given number is a
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Unary Operation
Binary Operation
Relation
None of these
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Question # 16
Decimal part of irrational number is
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Terminating
Repeating only
Neither repeating nor terminating
Repeating and terminating
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Question # 17
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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Question # 18
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Question # 19
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An empty set
Universal set
A singleton set
None of these
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Question # 20
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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
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Question # 21
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square root function
identity function
linear function
quadratic function
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Question # 22
The set (Z,+) forms a group
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Forms a group w.r.t addition
Non commutative group w.r.t multiplication
Forms a group w.r.t multiplication
Doesn't form a group
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Question # 23
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
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Question # 24
The set {-1,1} is closed under the binary operation of
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Addition
Multiplication
Subtraction
Division
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Question # 25
The function {f(x,y)|y = ax2 +bx +c} is
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One-one function
Constant function
Onto function
Quadratic function
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Question # 26
If x = 1/x for x ∈ R then the value of x is
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±1
0
2
4
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Question # 27
If S = {3,6,9,12.......}, then
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S = Four multiples of 3
S = Set of even numbers
S = Set of prime numbers
S = All multiples of 3
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Question # 28
If n(X) = 18, n(X∩Y) = 7, n(X∪ Y) = 40 then n(Y) =
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1
12
5
29
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Question # 29
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A
B
U
None of these
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Question # 30
If B⊆ A, then complement of B in A is = -----------------------
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A-B
A∩B
B-A
A∪B
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Question # 31
If we have a statement "if p then q" then q is called
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Conclusion
Implication
Unknown
Hypothesis
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