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ECAT Mathematics Chapter 1 Number System Online Test MCQs With Answers
Question # 1
√x = ______ if is a prime number
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Rational no
Natural no
Irrational no
Complex no
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Question # 2
a >b, b >c ⇒a >c is a
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Multiplicative property
Additive property
Trichotomy property
Transitive property of inequality
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Question # 3
√11 is
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an irrational number
Rational number
odd number
Negative number
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Question # 4
Q∪ Q' =
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Q
Q'
N
R
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Question # 5
3/4 is ______
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An odd number
An even number
A natural number
A rational number
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Question # 6
Associative law of multiplication
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ab - ba
a(bc) = (ab) c
a(b + c) = ab +ac
(a +b)c = ac + bc
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Question # 7
If in a set of real no a is additive identity then
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a+a = 2a
a+a = 1
a+a = 0
None of these
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Question # 8
∀x, y ∈ R, either x = y or x > y or x < y is
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Transitive property
Reflexive property
Trichotomy property
None of these
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Question # 9
The square roots of negative numbers is called
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Real no
Complex no
Positive no
Negative no
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Question # 10
The sum of complex number (a,b) and (c,d) is
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Question # 11
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15
15 i
-15 i
-15
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Question # 12
Every prime number is also
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Rational number
Even number
Irrational number
Multiple of two numbers
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Question # 13
In R, the additive identity is
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0
1
-1
None
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Question # 14
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Question # 15
2/9,5/7∈ R,(2│9)(5│7)=10/63∈R this property is called
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Associative property
Identity property
Commutative property
Closure property w.r.t multiplication
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Question # 16
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additive property
multiplicative property
additive identity
multiplicative identity
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Question # 17
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A rational number
A natural number
An irrational number
An integer
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Question # 18
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Question # 19
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N
r
2r
π
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Question # 20
The square root of every incomplete square is an
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Rational numbers
Even numbers
odd numbers
Irrational numbers
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Question # 21
If a > b or a < b than a = b is a
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Additive property
Transitive property
Trichotomy property of inequality
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Question # 22
In (x + iy) x is the known as
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Imaginary part of complex number
Real part of complex number
Complex number
None of above
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Question # 23
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1
-i
i
0
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Question # 24
√23 is
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A rational number
A irrational number
An even integer
A factor of 36
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Question # 25
QUQ'
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Question # 26
Any whole number can be written as a product of factors which are
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Even number
Odd numbers
Prime number
Rational number
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Question # 27
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1
-1
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Question # 28
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Question # 29
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Question # 30
The multiplicative inverse of 0 is
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1
-1
0
Does not exist
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Question # 31
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additive property
multiplicative property
additive inverse
additive identity
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