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ECAT Mathematics Chapter 1 Number System Online Test MCQs With Answers
Question # 1
Every real number is
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A complex number
A rational number
A natural number
A prime number
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Question # 2
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 # 3
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Question # 4
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 # 5
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1
-i
i
0
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Question # 6
Any recurring decimal represents a
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Irrational no
Integer
Rational no
None of these
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Question # 7
Rational number is a number which can be written as a terminating decimal fraction or a
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Non-terminating decimal fraction
Non-recurring
Recurring decimal fraction
a, b and c
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Question # 8
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Associative property of addition
Associative property of multiplication
Commutative property of addition
Commutative property of multiplication
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Question # 9
The√ is used for the
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Positive square root
Negative square root
+ve and -ve square root
Whole number
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Question # 10
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Question # 11
Name the property used in 1000 x 1 = 1000
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additive inverse
multiplicative inverse
additive identity
multiplicative identity
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Question # 12
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 # 13
√23 is
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A rational number
A irrational number
An even integer
A factor of 36
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Question # 14
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Commutative law of multiplication
Closure law of multiplication
Associative law of multiplication
Multiplication identity
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Question # 15
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A rational number
A irrational number
An even integer
A factor of 36
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Question # 16
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Question # 17
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Question # 18
QUQ'
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Question # 19
∀ a ε R ∃ o ε R such that a + v = 0 + a = a is property of
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Commutative law of addition
Associative law of addition
Additive identity
Additive inverse
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Question # 20
If Z
1
= 1+ i, Z
2
= 2+3i , then |Z
1
-Z
2
| =?
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√5
√7
-1-2i
√3
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Question # 21
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Question # 22
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Principle of equality of fractions
Rule for product of fractions
Golden rule for fractions
Rule for quotient of fractions
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Question # 23
For each real number, there is a number which is its
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Negative
Possitive
Opposite
Similar
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Question # 24
202.04 is an example of
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Recurring decimals
Non-recurring decimals
Terminating decimals
None of above
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Question # 25
The value of x, and y, when (x + iy)
2
= 5 + 4i
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X = 2, y = 1
X = -2, y = 1
X = 2, y = -1
X = 2, y = 2
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Question # 26
Q∪ Q' =
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Q
Q'
N
R
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Question # 27
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Rule of quotient of fraction
Golden rule of fraction
Rule for product of fraction
Principle for equality of fraction
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Question # 28
2.333....is a
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Irrational no
Complex no
Rational no
None of these
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Question # 29
∀x,y∈R and x> 0 , y>0, if x > y
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None of these
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Question # 30
π is ______
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A complex number
A rational number
A natural number
An irrational number
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Question # 31
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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