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Mathematics ECAT Pre Engineering Chapter 1 Number System Online Test MCQs With Answers
Question # 1
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Question # 2
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 # 3
Every real number is
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A complex number
A rational number
A natural number
A prime number
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Question # 4
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A rational number
A irrational number
An even integer
A factor of 36
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Question # 5
If Z
1
= 1 + i, Z
2
= 2+3i, then |Z
1
- Z
2
| = ?
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Question # 6
The multiplicative inverse of 1 - 2i is
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Question # 7
If 0 = R, thenthe additive inverse of a is
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1/9
1/-9
a
-a
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Question # 8
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0
1
-1
2
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Question # 9
What is the conjugate of -6 -i
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-6 +i
6 + i
-6 -i
6 -i
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Question # 10
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Question # 11
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 # 12
∀x,y,z ∈ R and z 0,then
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x > y ⇒ xz > yz
x<y ⇒ xz < yz
x < y ⇒ xz > yz
None of these
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Question # 13
∀ 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 # 14
a >b ⇒a +c >b +c is known as
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Trichotomy property
Additive property of inequality
Transitive property
Multiplicative property
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Question # 15
(a+bi) - (c+di)=
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(a+b) = (c+d)
(a+c) + i(b+d)
(a - c) + (c- d)i
(a - c)+ (b - d)i
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Question # 16
∀x,y∈ R and x < 0, y < 0, which one is true
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xy < o
xy = o
xy > o
None of these
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Question # 17
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A prime number
An integer
A whole number
An irrational number
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Question # 18
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Associative property of addition
Commutative property of addition
Distributive property
Additive identity
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Question # 19
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Question # 20
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 # 21
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Principle of equality of Fractions
Rule for product of fraction
Golden rule of fraction
Rule of quotient of Fraction
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Question # 22
√x = ______ if is a prime number
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Rational no
Natural no
Irrational no
Complex no
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Question # 23
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 # 24
(a, b) + (-a, -b) =
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(0,0)
(a, b)
(-a, -b)
(1, 1)
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Question # 25
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1
-i
i
0
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Question # 26
Name the property used in 4 x (5 x 8) = ( 4 x 5) x 8
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Associative property of addition
Associative property of multiplication
Additive identity
Multiplicative identity
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Question # 27
The property used in -3 <-2 ⇒0 <1
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Commutative property
Additive property of inequality
Additive inverse
Additive identity
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Question # 28
Multiplicative inverse of "1" is
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0
±1
1
{0,1}
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Question # 29
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Associative law of multiplication
Commutative law of addition
Commutative law of multiplication
Associative law of addition
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Question # 30
If a is any real number and a = a is called
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symmetric property
Trichotomy Properties
Transitive Property
Reflexive Properties
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Question # 31
The set of natural no. is closed under
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multiplication
subtraction
difference
division
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