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ECAT Pre General Science Mathematics Chapter 1 Number System Online Test MCQs With Answers
Question # 1
i
101
=
Choose an answer
i
i
2
-i
-1
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Question # 2
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Principle of equality of fractions
Rule for product of fraction
Rule for quotient of fraction
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Question # 3
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 # 4
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Question # 5
∀ z ∈ C, multipliucative is
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(1,1)
(1,0)
(0,1)
None of these
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Question # 6
The set {1, 2, 3, 4, ....} is called
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Set of Natural numbers
Set of whole numbers
Set of rational number
Set of irrational numbers
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Question # 7
The product of complex numbers (a,b) and (c,d) is
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(ac, bd)
(ac-bd, ad+bc)
(ab,cd)
(ac+bd,ad-bc)
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Question # 8
Q∪ Q' =
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Q
Q'
N
R
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Question # 9
For each real number, there is a number which is its
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Negative
Possitive
Opposite
Similar
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Question # 10
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(x, y)
(kx, y)
(x, ky)
(kx, ky)
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Question # 11
The solution set of the equation |3x + 2| = 5 is
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Question # 12
Geometrically the modulus of a complex number represents its distance from the
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Point (1,0)
Point (0,1)
Point (1,1)
Point (0,0)
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Question # 13
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Additive property of inequality
Commutative property
Additive inverse
Additive identity
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Question # 14
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 # 15
If a set S contains n elements then P (S) has ........ number of elements
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2
n
2
n2
2.n
n
2
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Question # 16
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 # 17
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Closure law of addition
Associative law of addition
Commutative law of multiplication
Associative law of multiplication
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Question # 18
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Question # 19
In R the right cancellation property w.r.t. addition is
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Question # 20
(√3+√5)+√7 = √3 +(√5 +√7) property used in above is
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Commutative property of addition
Closure property of addition
Additive inverse
Associative property w.r.t to adition
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Question # 21
(a
-1
)
-1
=
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a
-1
a
-a
None of above
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Question # 22
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 # 23
Multiplicative inverse of "1" is
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0
±1
1
{0,1}
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Question # 24
Multiplicative inverse of 0 is
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0
1
±1
Does not exist
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Question # 25
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 # 26
The symbol of irrational is
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W
N
Q
Q'
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Question # 27
Every real number is
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a positive integer
a rational number
a negative integer
a complex number
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Question # 28
The identity element with respect to subtraction is
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0
1
-1
Does not exist
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Question # 29
Any whole number can be written as a product of factors which are
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Even number
Odd numbers
Prime number
Rational number
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Question # 30
Any recurring decimal represents a
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Irrational no
Integer
Rational no
None of these
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Question # 31
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Associative property of addition
Associative property of multiplication
Commutative property of addition
Commutative property of multiplication
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