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ECAT Pre General Science Mathematics Chapter 1 Number System Online Test MCQs With Answers
Question # 1
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(x, y)
(kx, y)
(x, ky)
(kx, ky)
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Question # 2
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A prime number
An integer
A whole number
An irrational number
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Question # 3
The set of rationals numbers between 0 and I is
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Finite
Null set
Infinite
None of these
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Question # 4
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Question # 5
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Commutative law of addition
Associative law of addition
Additive identity
Additive inverse
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Question # 6
Every prime number is also
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Rational number
Even number
Irrational number
Multiple of two numbers
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Question # 7
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 # 8
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 # 9
14 is not a
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Prime number
Whole number
Even number
Real number
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Question # 10
If 0 = R, thenthe additive inverse of a is
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1/9
1/-9
a
-a
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Question # 11
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Question # 12
√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 # 13
The multiplicative inverse ofx^(-1) is
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x
a-2
0
1
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Question # 14
If a and b are real numbers then a+b is also real number this law is called
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associative law of addition
closure law of addition
Distributive law of addition
Commutative law of addition
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Question # 15
∀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 # 16
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-3 -2i
3 +2i
1 + 2i
1 - 2i
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Question # 17
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Question # 18
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Question # 19
Q∪ Q' =
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Q
Q'
N
R
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Question # 20
The solution set of the equation |3x + 2| = 5 is
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Question # 21
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Question # 22
i
2
=
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1
2
-1
0
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Question # 23
i
-(4n+2)
= -------------------------------
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1
i
-1
-i
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Question # 24
6 is
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A prime integar
An irrational number
A rational number
An odd integer
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Question # 25
(a,0) x (c,0) =
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(0,ac)
(ac,0)
(0,0)
(a,c)
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Question # 26
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Question # 27
i
2
=
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1
2
-1
0
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Question # 28
The set {0,-1} hold closure property under
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Addition
Both a & c
Multiplication
None of these
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Question # 29
QUQ, =
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N
R
W
Z
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Question # 30
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None of these
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Question # 31
The identity element with respect to subtraction is
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0
1
-1
Does not exist
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