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ECAT Mathematics Chapter 1 Number System Online Test MCQs With Answers
Question # 1
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Question # 2
It is not possible to find the exact value of
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π
√9
∛27
√1
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Question # 3
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 # 4
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1
-1
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Question # 5
(a-1)-1 =
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a-1
a
-a
None of above
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Question # 6
(7, 9) + (3, -5) =
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(4, 4)
(10, 4)
(9, -5)
(7, 3)
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Question # 7
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A rational number
An irrational number
An odd number
A prime number
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Question # 8
If a set S contains n elements then P (S) has ........ number of elements
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2
n
2
n2
2.n
n
2
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Question # 9
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Question # 10
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Question # 11
202.04 is an example of
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Recurring decimals
Non-recurring decimals
Terminating decimals
None of these
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Question # 12
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 # 13
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 # 14
If Z
1
= 1+ i, Z
2
= 2+3i , then |Z
1
-Z
2
| =?
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√5
√7
-1-2i
√3
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Question # 15
Zero is
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An irrational number
A rational number
A negative integer
A positive number
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Question # 16
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 # 17
if Z1 = 1+i, Z2= 2+3i, then |Z2 -Z1| =
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√3 i
√7
-2-i
√5
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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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are real no
both are not real
are imaginary no
both are imaginary
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Question # 20
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Commutative property of addition
Closure property of addition
Additive inverse
Associative property w.r.t. to addition
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Question # 21
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A positive integer
A negative integer
A natural number
An irrational number
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Question # 22
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Question # 23
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Set of whole number
Rational Numbers
Complex numbers
Whole numbers
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Question # 24
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Question # 25
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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 # 26
Name the property used in 4 x (5 x 8) = ( 4 x 5) x 8
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Associative property of addition
Associative property of multiplication
Additive identity
Multiplicative identity
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Question # 27
(a, b) + (-a, -b) =
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(0,0)
(a, b)
(-a, -b)
(1, 1)
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Question # 28
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 # 29
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real number
complex number
rational number
irrational number
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Question # 30
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A rational number
A irrational number
An even integer
A factor of 36
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Question # 31
In R, the multiplicative identity is
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0
1
-1
None
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