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Mathematics ECAT Pre Engineering Chapter 1 Number System Online Test MCQs With Answers
Question # 1
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Principle of equality of fractions
Rule for product of fraction
Rule for quotient of fraction
Golden rule of fractions
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Question # 2
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 # 3
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Question # 4
Such fraction which can not be written in the form ofp⁄q where p,q and q≠ 0,such fractions are called.
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Fractinal numbers
Rational Numbers
Even Numbers
Whole Numbers
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Question # 5
(a,b) +(-a,-b) =
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(0,0)
(a,b)
(-a,-b)
(1,1)
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Question # 6
If z
1
= 2 + 6i and z
2
= 3 + 7i, then which expression defines the product of z
1
and z
2
?
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36 + (-32)i
-36 + 32i
6 + (-11)1
0, +(-12)i
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Question # 7
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real part of z
imaginary part of z
conjugate of z
modulus of z
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Question # 8
∀a,b,c∈R, a >b ∧ b>c ⇒ a >c is
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Trichotomy property
Transitive property
Symmetric property
Additive property
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Question # 9
The square root of 2i - 20i is
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±(5 - 2i)
±(5+ 2i)
(5 - 2i)
None of these
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Question # 10
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Question # 11
If Z
1
= 1 + i, Z
2
= 2+3i, then |Z
1
- Z
2
| = ?
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Question # 12
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Associative law of multiplication
Commutative law of addition
Commutative law of multiplication
Associative law of addition
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Question # 13
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A complex number
A rational number
A natural number
An irrational number
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Question # 14
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Commutative law of addition
Associative law of addition
Additive identity
Additive inverse
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Question # 15
Every prime number is also
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Rational number
Even number
Irrational number
Multiple of two numbers
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Question # 16
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Question # 17
If Z = (1,2), then Z
-1
= ?
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(0.2, 0.4)
(-0.2, 0.4)
(0.2, -0.4)
(-0.2, -0.4)
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Question # 18
The equation |x + 4| = x has solution
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x = -2
x = 2
x = -4
x = 4
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Question # 19
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Question # 20
4/√49 is a
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Irrational Number
Prime Number
Rational number
Whole number
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Question # 21
The multiplicative inverse of 2/3 is
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3/2
-2/3
-3/2
1
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Question # 22
In R the left cancellation property w.r.t addition is
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Question # 23
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Additive property of inequality
Commutative property
Additive inverse
Additive identity
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Question # 24
The identity element with respect to subtraction is
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0
-1
0 and 1
None of thes
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Question # 25
√2 is a number
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Rational
Irrational
Even
Odd
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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
2.333....is a
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Irrational no
Complex no
Rational no
None of these
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Question # 28
2/9,5/7∈ R,(2│9)(5│7)=10/63∈R this property is called
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Associative property
Identity property
Commutative property
Closure property w.r.t multiplication
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Question # 29
In R, the multiplicative inverse of a is
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0
1
-a
1/a
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Question # 30
√11 is
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an irrational number
Rational number
odd number
Negative number
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