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ECAT Pre General Science Mathematics Chapter 1 Number System Online Test MCQs With Answers
Question # 1
0 (zero) is
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An irrational number
A rational number
A negative integer
A positive number
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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 above
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Question # 3
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Question # 4
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 # 5
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Question # 6
A non-terminating non_recurring decimal represents an
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Irrational no
Both a & c
Rational no
None of these
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Question # 7
i
2
=
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1
2
-1
0
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Question # 8
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 # 9
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 # 10
A prime number can be a factor of a square only if it occurs in the square at least
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Once
Thirce
Twice
None of these
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Question # 11
a >b, b >c ⇒a >c is a
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Multiplicative property
Additive property
Trichotomy property
Transitive property of inequality
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Question # 12
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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 # 13
Decimal part of irrational number is
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Terminating
Repeating only
Neither repeating nor terminating
Repeating and terminating
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Question # 14
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 # 15
√x = ______ if is a prime number
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Rational no
Natural no
Irrational no
Complex no
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Question # 16
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Question # 17
If z
1
= (a,b), z
2
=(c,d), then z
1
z
2
= -------------------
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(ac,bd)
(ac+bd, ad-bc)
(ac-bd , ad+bc)
(ac-bd , ad-bc)
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Question # 18
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z is purely imaginary
a is any complex number
z is real
None of these
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Question # 19
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A natural number
A rational number
An irrational number
A whole number
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Question # 20
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Question # 21
(a, b) + (-a, -b) =
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(0,0)
(a, b)
(-a, -b)
(1, 1)
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Question # 22
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Question # 23
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Associative law of addition
Commutative law of addition
Additive identity
Closure law of addition
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Question # 24
4/√49 is a
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Irrational Number
Prime Number
Rational number
Whole number
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Question # 25
The additive inverse of 2/3 is
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3/2
-2/3
-3/2
0
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Question # 26
I is not
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Real number
Natural number
Prime Number
Whole Number
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Question # 27
The√ is used for the
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Positive square root
Negative square root
+ve and -ve square root
Whole number
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Question # 28
2.333....is a
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Irrational no
Complex no
Rational no
None of these
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Question # 29
If A = {x / x ∈ R ∧ x
2
- 16 = 0} then A =
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- x
Infinite set
Φ
{-4,4}
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Question # 30
The equation |x + 4| = x has solution
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x = -2
x = 2
x = -4
x = 4
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Question # 31
The real number system contains.
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Positive Numbers
Negative numbers
Zero
(option a, b and c)
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