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ECAT Mathematics Chapter 1 Number System Online Test MCQs With Answers
Question # 1
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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 # 2
Some of two real numbers is also a real number , this property is called:
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Commutative property w.r.t addition
Closure property w.r.t. addition
Associative property w.r.t. addition
Distributive property w.r.t addition
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Question # 3
(a,0) x (c,0) =
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(0,ac)
(ac,0)
(0,0)
(a,c)
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Question # 4
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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 # 5
The square root of every incomplete square is an
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Rational numbers
Even numbers
odd numbers
Irrational numbers
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Question # 6
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Question # 7
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-3 -2i
3 +2i
1 + 2i
1 - 2i
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Question # 8
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 # 9
(7, 9) + (3, -5) =
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(4, 4)
(10, 4)
(9, -5)
(7, 3)
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Question # 10
The multiplicative inverse of 4 is
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-4
-1/4
1/4
1
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Question # 11
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Reflexive property
Symmetric property
Transitive property
Additive property
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Question # 12
i
3
=
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-1
i
-i
1
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Question # 13
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 # 14
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 # 15
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Question # 16
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0
1
-1
2
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Question # 17
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Associative law of addition
Commutative law of addition
Additive identity
Closure law of addition
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Question # 18
1/3 is ______
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A prime number
An integer
A rational number
An irrational number
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Question # 19
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real part of z
imaginary part of z
conjugate of z
modulus of z
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Question # 20
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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 # 21
∀a,b, c ε R ac = bc ⇒ a = b, c ≠ 0 is a
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Symmetric property
Cancellation property w.r.t multiplication
Reflexive property
Transitive property
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Question # 22
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 # 23
Name the property used in 100 + 0 = 100
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Additive inverse
Multiplicative inverse
Additive identity
Multiplicative identity
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Question # 24
In (x + iy), y is called as
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Imaginary part
Complex number
Real part
None of above
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Question # 25
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Question # 26
∀ a ε R ∃ o ε R such that a + v = 0 + a = a is property of
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Commutative law of addition
Associative law of addition
Additive identity
Additive inverse
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Question # 27
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Reflexive property
Symmetric property
Transitive property
Additive property
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Question # 28
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Commutative law of addition
Associative law of addition
Additive identity
Additive inverse
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Question # 29
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additive property
multiplicative property
additive inverse
additive identity
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Question # 30
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 # 31
If z
1
= 2 + 6i and z
2
= 3 + 7i, then which expression defines the product of z
1
and z
2
?
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36 + (-32)i
-36 + 32i
6 + (-11)1
0, +(-12)i
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