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Online Tests
Mathematics ECAT Pre Engineering Chapter 1 Number System Online Test MCQs With Answers
Question # 1
The multiplicative inverse ofx^(-1) is
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x
a-2
0
1
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Question # 2
√2 is a number
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Rational
Irrational
Even
Odd
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Question # 3
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Multiplication property
Additive property
Trichotomy property
Transitive property of inequality
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Question # 4
The real number system contains.
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Positive Numbers
Negative numbers
Zero
(option a, b and c)
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Question # 5
π is ______
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A complex number
A rational number
A natural number
An irrational number
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Question # 6
(a
-1
)
-1
=
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a
-1
a
-a
None of above
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Question # 7
6 is
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A prime integer
An irrational number
A rational number
An odd integer
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Question # 8
The multiplicative inverse of 1 - 2i is
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Question # 9
i
2
=
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1
2
-1
0
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Question # 10
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-8
8
8i
32
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Question # 11
Every irrational number is
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A real number
A prime number
A natural number
An integer
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Question # 12
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 # 13
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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
There is no element common in
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N and W
E and W
N and O
Q and Q'
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Question # 16
The solution set of the equation |3x + 2| = 5 is
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Question # 17
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are real no
both are not real
are imaginary no
both are imaginary
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Question # 18
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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 # 19
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Question # 20
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Question # 21
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Question # 22
Name the property used in 4 + 9 = 9 + 4
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Associative property of addition
Commutative property of addition
Distributive property
Additive identity
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Question # 23
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Reflexive property
Symmetric property
Cancellations property w.r.t. addition
Transitive property
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Question # 24
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0
1
-1
None of these
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Question # 25
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Reflexive property
Symmetric property
Transitive property
Additive property
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Question # 26
i =
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Question # 27
The additive identity of real number is
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1
2
1/2
0
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Question # 28
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(x, y)
(kx, y)
(x, ky)
(kx, ky)
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Question # 29
The set of positive integers, 0 and negative integers is known as the set of
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Natural numbers
Rational numbers
All integers
Irrational numbers
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Question # 30
If z
1
= 1 + 2i, z
2
= 3 + 4i then
Choose an answer
z
1
> z
2
z
1
= z
2
z
1
< z
2
None of these
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