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ECAT Mathematics Chapter 1 Number System Online Test MCQs With Answers
Question # 1
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Question # 2
What is the conjugate of -7 -2i ?
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-7 + 2i
7 +2i
7 -2i
√53
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Question # 3
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1
-1
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Question # 4
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A natural number
A rational number
An irrational number
A whole number
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Question # 5
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 # 6
24 can be written as a product of
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Odd factors
Even factors
Whole factors
Prime factors
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Question # 7
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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 # 8
In R the left cancellation property w.r.t addition is
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Question # 9
Every whole number is
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A real number
An irrational number
A prime number
A negative integer
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Question # 10
If z
1
=√-36 ,z
2
=√-25,z3 =√-16 then
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15
15i
-15i
-15
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Question # 11
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 # 12
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Question # 13
Additive inverse of - a - b is
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a
-a + b
a - b
a + b
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Question # 14
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Question # 15
QUQ'
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Question # 16
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 # 17
If
∀a,b ε R,then a +b ε R is a property
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Closure law of addition
Associative law of addition
Additive inverse
Additive identity
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Question # 18
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Question # 19
i
3
=
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-1
i
-i
1
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Question # 20
In set builder notation the set {0,1,2,........100} can be written as
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{x / xε B ∧ x ≤ 100}
{x / x ∈ W ∧ x < 101}
{x / x ∈ Z ∧ x < 101}
The set of first 100 whole numbers
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Question # 21
The identity element with respect to subtraction is
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0
-1
0 and 1
None of thes
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Question # 22
2.333....is a
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Irrational no
Complex no
Rational no
None of these
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Question # 23
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Question # 24
Every prime number is also
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Rational number
Even number
Irrational number
Multiple of two numbers
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Question # 25
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are real no
both are not real
are imaginary no
both are imaginary
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Question # 26
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 # 27
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Additive property in R
Multiplication property in R
Cancellation property in R
Distribution property in R
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Question # 28
(a-1)-1 =
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a-1
a
-a
None of above
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Question # 29
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additive property
multiplicative property
additive identity
multiplicative identity
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Question # 30
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 # 31
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real number
complex number
rational number
irrational number
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