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Mathematics ECAT Pre Engineering Chapter 1 Number System Online Test MCQs With Answers
Question # 1
The equation |x + 4| = x has solution
Choose an answer
x = -2
x = 2
x = -4
x = 4
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Question # 2
∀x,y∈R and x> 0 , y>0, if x > y
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None of these
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Question # 3
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A prime number
An integer
A whole number
An irrational number
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Question # 4
Name the property used in a (b-c) = ab - ac
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commutative property of multiplication
distributive property of multiplication
associative property of multiplication
multiplicative inverse
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Question # 5
The set of rationals numbers between 0 and I is
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Finite
Null set
Infinite
None of these
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Question # 6
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Question # 7
3/2 is
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An irrational number
Whole number
A positive integer
A rational number
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Question # 8
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Symmetric property
Cancellation property w.r.t. multiplication
Reflexive property
Transitive property
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Question # 9
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Commutative law of addition
Associative law of addition
Additive identity
Additive inverse
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Question # 10
The additive inverse of 0 is
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1
-1
0
Does not exist
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Question # 11
(a,0) x (c, 0) =
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(0,ac)
(ac, 0)
(0,0)
(a, c)
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Question # 12
The equation |x +4| = x has solution
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x = -2
x = 2
x = -4
x = 4
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Question # 13
In (x +iy) y is called as
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Imaginary part
Complex number
Real part
None of above
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Question # 14
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Question # 15
In set builder notation the set {0,1,2,........100} can be written as
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{x / xε B ∧ x ≤ 100}
{x / x ∈ W ∧ x < 101}
{x / x ∈ Z ∧ x < 101}
The set of first 100 whole numbers
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Question # 16
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15
15 i
-15 i
-15
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Question # 17
i
101
=
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i
i
2
-i
-1
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Question # 18
The symbol of irrational is
Choose an answer
W
N
Q
Q'
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Question # 19
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 # 20
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1
3
2-i
-1
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Question # 21
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Question # 22
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 # 23
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A rational number
A irrational number
An even integer
A factor of 36
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Question # 24
Which of the following sets has closure property w.r.t. addition
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{ 0 }
{ 1 }
{ 0, -1}
{ 1, -1}
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Question # 25
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Question # 26
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 # 27
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Additive property of inequality
Commutative property
Additive inverse
Additive identity
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Question # 28
The set {1,2,3,4......} is called
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Set of natural numbers
Set of whole numbers
Set of rational number
Set of irrational numbers
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Question # 29
i
3
=
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-1
i
-i
1
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Question # 30
√2 +√3 +√5) = (√2 +√3 +√5: this property is called
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associative property w.r.t addition
commutative property
Closure property w.r.t addition
Additive identity
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Question # 31
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A rational number
An irrational number
An odd number
A prime number
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