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ECAT Mathematics Chapter 23 MCQs With Answers
Question # 1
Choose an answer
A = C
A = B
B = C
None of these
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Question # 2
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Question # 3
Z is a group under
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Subtraction
Multiplication
Addition
None of these
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Question # 4
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 # 5
The graph of a quadratic function is
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Circle
Straight line
Parabola
Triangle
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Question # 6
A = B iff
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All elements of A also the elements of B
A and B should be singleton
A and B have the same number of elements
If both have the same element
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Question # 7
If the intersection of two sets is non-empty, but either is a subset of other are called
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Disjoint sets
Over lapping
Equal sets
None of these
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Question # 8
The set {-1,1} is closed under the binary operation of
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Addition
Multiplication
Subtraction
Division
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Question # 9
The number of subsets of a set having three elements is
Choose an answer
4
6
8
none of these
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Question # 10
If n(A) = n then n(P(A)) is
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2n
n
2
n/2
2
n
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Question # 11
{0} is a
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Empty set
Singleton set
Zero set
Null Set
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Question # 12
The set {x|x∈N∧x-4=0} in tabular form is
Choose an answer
{-4}
{0}
{}
None of these
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Question # 13
The set of complex numbers forms a group under the binary operation of
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Addition
none of these
Division
Subtraction
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Question # 14
A function whose range is just one element is called
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One-one function
Constant function
Onto function
Identity function
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Question # 15
The set of rational numbers is subset of
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The set of natural numbers
The set of real numbers
The set of integers
The set of whole numbers
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Question # 16
The number of subsets of B = {1,2,3,4,5}
Choose an answer
10
32
16
5
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Question # 17
The set (Z,+) forms a group
Choose an answer
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 # 18
A = B if
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A is equivalent to B
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Question # 19
Let A and B be two sets. If every element of A is also an element of B then
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Question # 20
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1/x
-x
2x
0.5 x
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Question # 21
Every subset of a finite set is
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Disjoint
Null
Finite
Infinite
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