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ECAT Mathematics Chapter 1 Number System Online Test MCQs With Answers
Question # 1
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Question # 2
i
3
=
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-1
i
-i
1
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Question # 3
I is not
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Real number
Natural number
Prime Number
Whole Number
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Question # 4
The set {1, 2, 3, 4, ....} is called
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Set of Natural numbers
Set of whole numbers
Set of rational number
Set of irrational numbers
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Question # 5
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Trichotomy property
Additive property of inequality
Transitive property
Multiplicative property
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Question # 6
Which element is the additive inverse of (a, b) in Complex numbers?
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(a, 0)
(0, b)
(a, b)
(-a, -b)
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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
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1
-1
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Question # 9
The set of rationals numbers between 0 and I is
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Finite
Null set
Infinite
None of these
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Question # 10
1/3 is ______
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A prime number
An integer
A rational number
An irrational number
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Question # 11
Which of the following has the same value as i
113
?
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i
-1
-i
1
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Question # 12
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Question # 13
∀a,b,c∈R, a >b ∧ b>c ⇒ a >c is
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Trichotomy property
Transitive property
Symmetric property
Additive property
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Question # 14
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Question # 15
The polar form of complex number x ≠ I y =
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r cos θ+ r sin θ
r cos θ+ is sin θ
cos θ+ r sin θ
i cos θ+ i sin θ
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Question # 16
The multiplicative inverse of -3i is
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3i
-3i
-1/3i
1/3 i
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Question # 17
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Question # 18
The square root of 2i - 20i is
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+-(5 - 2i)
+-(5 + 2i)
(5 - 2i)
None of these
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Question # 19
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Reflexive property
Symmetric property
Transitive property
Additive property
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Question # 20
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Principle of equality of Fractions
Rule for product of fraction
Golden rule of fraction
Rule of quotient of Fraction
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Question # 21
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Question # 22
Every natural number is
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A prime number
An irrational number
An integer
An even number
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Question # 23
√2 +√3 +√5) = (√2 +√3 +√5: this property is called
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associative property w.r.t addition
commutative property
Closure property w.r.t addition
Additive identity
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Question # 24
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 # 25
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 # 26
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Question # 27
Every recurring decimal represents
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A natural number
A rational number
An irrational number
A whole number
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Question # 28
Every prime number is also
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Rational number
Even number
Irrational number
Multiple of two numbers
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Question # 29
Zero is
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An irrational number
A rational number
A negative integer
A positive number
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Question # 30
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