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ECAT Pre General Science Mathematics Chapter 1 Number System Online Test MCQs With Answers
Question # 1
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Rational
Irrational
Natural
Odd
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Question # 2
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(a + b)c = ac + bc
a + b = b + a
(a + b) + c = a + (b + c)
a(b +c) = ab + ac
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Question # 3
i
3
=
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-1
i
-i
1
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Question # 4
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 # 5
If Z
1
= 1 + i, Z
2
= 2+3i, then |Z
1
- Z
2
| = ?
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Question # 6
If A = {x / x ∈ R ∧ x
2
- 16 = 0} then A =
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- x
Infinite set
Φ
{-4,4}
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Question # 7
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Multiplication property
Additive property
Trichotomy property
Transitive property of inequality
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Question # 8
14 is not a
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Prime number
Whole number
Even number
Real number
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Question # 9
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-3 -2i
3 +2i
1 + 2i
1 - 2i
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Question # 10
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 # 11
In R, the multiplicative inverse of a is
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0
1
-a
1/a
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Question # 12
i
3
=
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-1
i
-i
1
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Question # 13
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A natural number
A rational number
An irrational number
A whole number
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Question # 14
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are real no
both are not real
are imaginary no
both are imaginary
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Question # 15
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 # 16
The set of positive integers, 0 and negative integers is known as the set of
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Natural numbers
Rational numbers
All integers
Irrational numbers
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Question # 17
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 # 18
The set { 1 , -1} is closed w.r.t.
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Addition
Multiplications
Subtraction
None of these
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Question # 19
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Question # 20
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15
15 i
-15 i
-15
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Question # 21
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Question # 22
Such fraction which can not be written in the form ofp⁄q where p,q and q≠ 0,such fractions are called.
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Fractinal numbers
Rational Numbers
Even Numbers
Whole Numbers
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Question # 23
Which of the following has the same value as i
113
?
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i
-1
-i
1
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Question # 24
4/√49 is a
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Irrational Number
Prime Number
Rational number
Whole number
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Question # 25
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Reflexive property
Symmetric property
Transitive property
Additive property
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Question # 26
If z
1
= 1 + 2i, z
2
= 3 + 4i then
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z
1
> z
2
z
1
= z
2
z
1
< z
2
None of these
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Question # 27
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Question # 28
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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 # 29
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A rational number
A irrational number
An even integer
A factor of 36
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Question # 30
(7, 9) + (3, -5) =
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(4, 4)
(10, 4)
(9, -5)
(7, 3)
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Question # 31
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