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ECAT Mathematics Chapter 1 Number System Online Test MCQs With Answers
Question # 1
In R the left cancellation property w.r.t addition is
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Question # 2
If 4 > b or a < b than a = b is a
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Additive property
Transitive property
Trichotomy property of inequality
None of above
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Question # 3
(7, 9) + (3, -5) =
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(4, 4)
(10, 4)
(9, -5)
(7, 3)
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Question # 4
The multiplicative inverse of 4 is
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-4
-1/4
1/4
1
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Question # 5
(a-1)-1 =
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a-1
a
-a
None of above
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Question # 6
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Question # 7
Name the property used in 4.1 + (-4.1) = 0
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Additive inverse
Multiplication inverse
Additive identity
Multiplication identity
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Question # 8
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 # 9
√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 # 10
QUQ'
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Question # 11
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Question # 12
0 (zero) is
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An irrational number
A rational number
A negative integer
A positive number
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Question # 13
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Reflexive property
Symmetric property
Cancellations property w.r.t. addition
Transitive property
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Question # 14
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A rational number
An irrational number
An odd number
A prime number
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Question # 15
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 # 16
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 # 17
If z = (x,y) , then z ̅ =
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(-x,y)
(x,-y)
(-x, -y)
None of these
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Question # 18
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Reflexive property
Symmetric property
Transitive property
Additive property
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Question # 19
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z is purely imaginary
a is any complex number
z is real
None of these
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Question # 20
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 # 21
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 # 22
i
3
=
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-1
i
-i
1
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Question # 23
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Additive property of inequality
Commutative property
Additive inverse
Additive identity
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Question # 24
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 # 25
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Question # 26
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 # 27
O is ______
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A positive integer
A negative integer
A natural number
An integer
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Question # 28
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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 # 29
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-3 -2i
3 +2i
1 + 2i
1 - 2i
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Question # 30
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None of these
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