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ECAT Pre General Science Mathematics Chapter 1 Number System Online Test MCQs With Answers
Question # 1
I is not
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Real number
Natural number
Prime Number
Whole Number
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Question # 2
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 # 3
The square root of 2i - 20i is
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±(5 - 2i)
±(5+ 2i)
(5 - 2i)
None of these
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Question # 4
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A rational number
A natural number
An irrational number
An integer
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Question # 5
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Principle of equality of fractions
Rule for product of fractions
Golden rule for fractions
Rule for quotient of fractions
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Question # 6
a.a
-1
= a
-1
.a = 1 is a
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Commutative law of multiplication
Multiplicative identity
Associative law of multiplication
Multiplicative inverse
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Question # 7
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Question # 8
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 # 9
A non-terminating non_recurring decimal represents an
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Irrational no
Both a & c
Rational no
None of these
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Question # 10
0 (zero) is
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An irrational number
A rational number
A negative integer
A positive number
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Question # 11
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1
-1
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Question # 12
The identity element with respect to subtraction is
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0
1
-1
Does not exist
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Question # 13
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1
-i
i
0
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Question # 14
Name the property used in a (b-c) = ab - ac
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commutative property of multiplication
distributive property of multiplication
associative property of multiplication
multiplicative inverse
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Question # 15
The decimal fraction in which we have finite number of digits in its decimal part is called.
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recurring decimal fraction
Non terminating faction
Non recurring fraction
terminating decimal fraction
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Question # 16
A subset of set of complex number whose elements are of the form (a,0) is called
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Real number
Complex number
Rational number
Irrational number
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Question # 17
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Question # 18
i =
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Question # 19
i
=
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√1
√2
√-2
√-1
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Question # 20
The additive identity of real number is
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1
2
1/2
0
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Question # 21
In (x + iy) x is the known as
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Imaginary part of complex number
Real part of complex number
Complex number
None of above
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Question # 22
The additive inverse of 0 is
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1
-1
0
Does not exist
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Question # 23
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 # 24
The solution set of the equation |3x + 2| = 5 is
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Question # 25
1/3 is a decimal
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Recurring
Terminating
Non-terminating
None of the above
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Question # 26
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Question # 27
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Question # 28
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 # 29
i
9
=
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i
2
-1
1
i
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Question # 30
Every recurring decimal represents
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A natural number
A rational number
An irrational number
A whole number
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Question # 31
Multiplicative inverse of "1" is
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0
±1
1
{0,1}
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