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Mathematics ECAT Pre Engineering Chapter 1 Number System Online Test MCQs With Answers
Question # 1
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1
-1
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Question # 2
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 # 3
If in a set of real no a is multiplicative identity then
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a,a = a
2
a,a = 1
a,a = 0
None of these
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Question # 4
6 is
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A prime integar
An irrational number
A rational number
An odd integer
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Question # 5
In R the right cancellation property w.r.t. addition is
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Question # 6
If z=(x,y) then z has no multiplicative inverse when
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x ≠ 0, y = 0
x = 0, y = 0
x = 0, y ≠ 0
None of these
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Question # 7
Every recurring decimal represents
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A natural number
A rational number
An irrational number
A whole number
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Question # 8
Name the property used in 100 + 0 = 100
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Additive inverse
Multiplicative inverse
Additive identity
Multiplicative identity
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Question # 9
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 # 10
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-8
8
8i
32
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Question # 11
The real number system contains.
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Positive Numbers
Negative numbers
Zero
(option a, b and c)
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Question # 12
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x
y
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Question # 13
A subset of set of complex number whose elements are of the form (a,0) is called
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Real number
Complex number
Rational number
Irrational number
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Question # 14
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Question # 15
√23 is
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A rational number
A irrational number
An even integer
A factor of 36
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Question # 16
Which element is the additive inverse of (a,b) in Complex numbers
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(a,0)
(0,b)
(a,b)
(-a,-b)
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Question # 17
a.a
-1
= a
-1
.a = 1 is a
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Commutative law of multiplication
Multiplicative identity
Associative law of multiplication
Multiplicative inverse
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Question # 18
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 # 19
Zero is
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An irrational number
A rational number
A negative integer
A positive number
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Question # 20
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Question # 21
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 # 22
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1
-1
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Question # 23
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Question # 24
The sum of complex number (a,b) and (c,d) is
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Question # 25
In R the number of identity element w.r.t '+' is
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One
Two
Three
Four
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Question # 26
If z
1
= 1 + 2i, z
2
= 3 + 4i then
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z
1
> z
2
z
1
= z
2
z
1
< z
2
None of these
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Question # 27
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A rational number
A natural number
An irrational number
An integer
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Question # 28
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 # 29
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Question # 30
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Question # 31
202.04 is an example of
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Recurring decimals
Non-recurring decimals
Terminating decimals
None of above
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