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Mathematics ECAT Pre Engineering Chapter 1 Number System Online Test MCQs With Answers
Question # 1
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Question # 2
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Question # 3
What is the conjugate of -6 -i?
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-6 +i
6+i
-6 -i
6 -i
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Question # 4
4/√49 is a
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Irrational Number
Prime Number
Rational number
Whole number
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Question # 5
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Trichotomy property
Additive property of inequality
Transitive property
Multiplicative property
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Question # 6
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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 # 7
In R, the multiplicative inverse of a is
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0
1
-a
1/a
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Question # 8
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(x, y)
(kx, y)
(x, ky)
(kx, ky)
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Question # 9
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 # 10
In R the left cancellation property w.r.t addition is
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Question # 11
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-8
8
8i
32
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Question # 12
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Question # 13
∀x,y∈R and x> 0 , y>0, if x > y
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None of these
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Question # 14
(a+bi) - (c+di)=
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(a+b) = (c+d)
(a+c) + i(b+d)
(a - c) + (c- d)i
(a - c)+ (b - d)i
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Question # 15
Additive inverse of - a - b is
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a
-a + b
a - b
a + b
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Question # 16
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15
15 i
-15 i
-15
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Question # 17
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Question # 18
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Question # 19
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Question # 20
Name the property used in 4.1 + (-4.1) = 0
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Additive inverse
Multiplication inverse
Additive identity
Multiplication identity
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Question # 21
6 is
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A prime integer
An irrational number
A rational number
An odd integer
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Question # 22
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 # 23
Which of the following has the same value as i
113
?
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i
-1
-i
1
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Question # 24
If 4 > b or a < b than a = b is a
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Additive property
Transitive property
Trichotomy property of inequality
None of above
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Question # 25
√11 is
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an irrational number
Rational number
odd number
Negative number
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Question # 26
In R the right cancellation property w.r.t. addition is
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Question # 27
The multiplicative inverse of 4 is
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-4
-1/4
1/4
1
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Question # 28
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 # 29
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Question # 30
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Question # 31
Name the property used in 1000 x 1 = 1000
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additive inverse
multiplicative inverse
additive identity
multiplicative identity
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