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ECAT Mathematics Chapter 1 Number System Online Test MCQs With Answers
Question # 1
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Question # 2
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A natural number
A rational number
An irrational number
A whole number
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Question # 3
Additive inverse of - a - b is
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a
-a + b
a - b
a + b
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Question # 4
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Question # 5
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 # 6
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15
15 i
-15 i
-15
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Question # 7
The order axioms are satisfied by set of
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C
C and R
R
None of these
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Question # 8
√23 is
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A rational number
A irrational number
An even integer
A factor of 36
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Question # 9
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Question # 10
1.4142135... is ______
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A natural number
A rational number
A prime number
An irrational number
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Question # 11
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(x, y)
(kx, y)
(x, ky)
(kx, ky)
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Question # 12
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 # 13
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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 # 14
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1
-1
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Question # 15
Every natural number is
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A prime number
An irrational number
An integer
An even number
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Question # 16
The value of i
4n+1
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1
-1
i
i
2
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Question # 17
(a
-1
)
-1
=
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a
-1
a
-a
None of above
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Question # 18
The sum of complex number (a,b) and (c,d) is
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Question # 19
(a,b) +(-a,-b) =
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(0,0)
(a,b)
(-a,-b)
(1,1)
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Question # 20
What is the conjugate of -7 -2i?
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-7 + 2i
7 + 2i
7 -2i
None of these
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Question # 21
i
101
=
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i
i
2
-i
-1
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Question # 22
π is ______
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A complex number
A rational number
A natural number
An irrational number
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Question # 23
(7,9) +(3,-5) =
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(4,4)
(10,4)
(9,-5)
(7,3)
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Question # 24
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0
1
-1
2
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Question # 25
i
2
=
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1
2
-1
0
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Question # 26
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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 # 27
The negative square root of 9 can be written as:
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-√9
√9
√18
-√18
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Question # 28
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Trichotomy property
Additive property of inequality
Transitive property
Multiplicative property
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Question # 29
The multiplicative inverse of -3i is
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3i
-3i
-1/3i
1/3 i
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Question # 30
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Question # 31
(a, b) + (-a, -b) =
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(0,0)
(a, b)
(-a, -b)
(1, 1)
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