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Mathematics ECAT Pre Engineering Chapter 1 Number System Online Test MCQs With Answers
Question # 1
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 # 2
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 # 3
The solution set of the equation |3x + 2| = 5 is
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Question # 4
√2 is a number
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Rational
Irrational
Even
Odd
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Question # 5
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additive property
multiplicative property
additive inverse
additive identity
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Question # 6
Total number of subsets that can be formed out of the set {a,b,c} is
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1
4
8
12
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Question # 7
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 # 8
∀a,b, c ε R,a +c = b + c = > a = b
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Reflexive property
Symmetric property
Cancellations property w.r.t. addition
Transitive property
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Question # 9
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 # 10
If P is a whole number greater than 1, which has only P and I are factors. Then P is called
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Wholw number
Prime number
Even number
Odd number
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Question # 11
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 # 12
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 # 13
√(-1b) =?
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b i
-i b
b2
i√b
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Question # 14
1.4142135... is ______
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A natural number
A rational number
A prime number
An irrational number
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Question # 15
The multiplicative inverse of 4 is
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-4
-1/4
1/4
1
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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
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1
-i
i
0
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Question # 18
Additive inverse of - a - b is
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a
-a + b
a - b
a + b
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Question # 19
3/2 is
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An irrational number
Whole number
A positive integer
A rational number
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Question # 20
√23 is
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A rational number
A irrational number
An even integer
A factor of 36
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Question # 21
Q∪ Q' =
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Q
Q'
N
R
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Question # 22
Name the property used in 1000 x 1 = 1000
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additive inverse
multiplicative inverse
additive identity
multiplicative identity
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Question # 23
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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 # 24
The equation |x +4| = x has solution
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x = -2
x = 2
x = -4
x = 4
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Question # 25
2.333....is a
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Irrational no
Complex no
Rational no
None of these
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Question # 26
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Question # 27
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Rational
Irrational
Natural
Odd
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Question # 28
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 # 29
In polar form of complex number r =
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Question # 30
The additive inverse of 0 is
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1
-1
0
Does not exist
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Question # 31
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1
-1
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