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ECAT Pre General Science Mathematics Chapter 1 Number System Online Test MCQs With Answers
Question # 1
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real number
complex number
rational number
irrational number
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Question # 2
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Question # 3
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-3 -2i
3 +2i
1 + 2i
1 - 2i
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Question # 4
∀a,b,c∈R, a >b ∧ b>c ⇒ a >c is
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Trichotomy property
Transitive property
Symmetric property
Additive property
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Question # 5
The set {0,-1} hold closure property under
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Addition
Both a & c
Multiplication
None of these
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Question # 6
What is the conjugate of -6 -i
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-6 +i
6 + i
-6 -i
6 -i
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Question # 7
202.04 is an example of
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Recurring decimals
Non-recurring decimals
Terminating decimals
None of above
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Question # 8
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Question # 9
The set { 1 , -1} is closed w.r.t.
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Addition
Multiplications
Subtraction
None of these
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Question # 10
The equation |x +4| = x has solution
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x = -2
x = 2
x = -4
x = 4
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Question # 11
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 # 12
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Multiplication property
Additive property
Trichotomy property
Transitive property of inequality
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Question # 13
Every irrational number is
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A real number
A prime number
A natural number
An integer
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Question # 14
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 # 15
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15
15 i
-15 i
-15
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Question # 16
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Principle of equality of fractions
Rule for product of fractions
Golden rule of fractions
Rule for quotient of fractions
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Question # 17
The multiplicative inverse of 1 is
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1
-1
0
Does not exist
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Question # 18
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Principle of equality of fractions
Rule for product of fraction
Rule for quotient of fraction
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Question # 19
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Question # 20
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 = -i
x = 2, y = 2
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Question # 21
The symbol of irrational is
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W
N
Q
Q'
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Question # 22
The solution set of the equation |3x + 2| = 5 is
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Question # 23
∀x, y ∈ R, either x = y or x > y or x < y is
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Transitive property
Reflexive property
Trichotomy property
None of these
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Question # 24
The set of rational number is represented by
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W
R
Q'
Q
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Question # 25
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Associative property of addition
Commutative property of addition
Distributive property
Additive identity
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Question # 26
6 is
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A prime integar
An irrational number
A rational number
An odd integer
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Question # 27
The additive inverse of 2/3 is
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3/2
-2/3
-3/2
0
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Question # 28
If 0 = R, thenthe additive inverse of a is
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1/9
1/-9
a
-a
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Question # 29
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 # 30
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Question # 31
14 is not a
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Prime number
Whole number
Even number
Real number
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