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Online Tests
Mathematics ECAT Pre Engineering Chapter 1 Number System Online Test MCQs With Answers
Question # 1
6 is
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A prime integer
An irrational number
A rational number
An odd integer
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Question # 2
√2 is a number
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Rational
Irrational
Even
Odd
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Question # 3
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1
3
2-i
-1
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Question # 4
a >b ⇒a +c >b +c is known as
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Trichotomy property
Additive property of inequality
Transitive property
Multiplicative property
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Question # 5
Name the property used in 4 x (5 x 8) = ( 4 x 5) x 8
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Associative property of addition
Associative property of multiplication
Additive identity
Multiplicative identity
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Question # 6
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Set of whole number
Rational Numbers
Complex numbers
Whole numbers
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Question # 7
In R the right cancellation property w.r.t. addition is
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Question # 8
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 # 9
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1
-i
i
0
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Question # 10
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Question # 11
If Z = (1,2), then Z
-1
=?
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(0.2, 0.4)
(-0.2 ,0.4)
(0.2,-0.4)
(-0.2,-0.4)
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Question # 12
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Question # 13
a.a
-1
= a
-1
.a = 1 is a
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Commutative law of multiplication
Multiplication identity
Associative law of multiplication
Multiplication inverse
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Question # 14
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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 # 15
14 is not a
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Prime number
Whole number
Even number
Real number
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Question # 16
Decimal part of irrational number is
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Terminating
Repeating only
Neither repeating nor terminating
Repeating and terminating
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Question # 17
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 # 18
If Z = (1,2), then Z
-1
= ?
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(0.2, 0.4)
(-0.2, 0.4)
(0.2, -0.4)
(-0.2, -0.4)
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Question # 19
i
3
=
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-1
i
-i
1
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Question # 20
∀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 # 21
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Question # 22
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Question # 23
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 # 24
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 # 25
The sum of complex number (a,b) and (c,d) is
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Question # 26
i
2
=
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1
2
-1
0
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Question # 27
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15
15 i
-15 i
-15
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Question # 28
I is not
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Real number
Natural number
Prime Number
Whole Number
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Question # 29
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Rational
Irrational
Natural
Odd
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Question # 30
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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 # 31
Q∪ Q' =
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Q
Q'
N
R
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