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ECAT Mathematics Chapter 1 Number System Online Test MCQs With Answers
Question # 1
Total number of subsets that can be formed out of the set {a,b,c} is
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1
4
8
12
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Question # 2
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-8
8
8i
32
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Question # 3
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Question # 4
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Rational
Irrational
Natural
Odd
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Question # 5
The decimal fraction in which we have finite number of digits in its decimal part is called.
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recurring decimal fraction
Non terminating faction
Non recurring fraction
terminating decimal fraction
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Question # 6
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Trichotomy property
Additive property of inequality
Transitive property
Multiplicative property
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Question # 7
Q∪ Q' =
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Q
Q'
N
R
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Question # 8
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(x, y)
(kx, y)
(x, ky)
(kx, ky)
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Question # 9
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Question # 10
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Question # 11
Every real number is
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a positive integer
a rational number
a negative integer
a complex number
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Question # 12
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Question # 13
The additive inverse of 0 is
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1
-1
0
Does not exist
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Question # 14
0.25 is ______
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An irrational number
A natural number
A prime number
A rational number
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Question # 15
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Rational
Irrational
Even
Odd
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Question # 16
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Question # 17
If z=(x,y) then z has no multiplicative inverse when
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x ≠ 0, y = 0
x = 0, y = 0
x = 0, y ≠ 0
None of these
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Question # 18
202.04 is an example of
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Recurring decimals
Non-recurring decimals
Terminating decimals
None of these
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Question # 19
Name the property used in 100 + 0 = 100
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Additive inverse
Multiplicative inverse
Additive identity
Multiplicative identity
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Question # 20
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A rational number
A irrational number
An even integer
A factor of 36
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Question # 21
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Question # 22
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 # 23
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Closure law of addition
Closure law of multiplication
Commutative law of addition
Commutative law of multiplication
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Question # 24
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A complex number
A rational number
A natural number
An irrational number
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Question # 25
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Principle of equality of fractions
Rule for product of fraction
Rule for quotient of fraction
Golden rule of fractions
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Question # 26
If a is any real number and a = a is called
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symmetric property
Trichotomy Properties
Transitive Property
Reflexive Properties
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Question # 27
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Question # 28
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Question # 29
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Question # 30
The additive identity of real number is
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1
2
1/2
0
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Question # 31
√2 is a number
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Rational
Irrational
Even
Odd
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