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Online Tests
ECAT Pre General Science Mathematics Chapter 1 Number System Online Test MCQs With Answers
Question # 1
π is ______
Choose an answer
A complex number
A rational number
A natural number
An irrational number
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Question # 2
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Principle of equality of Fractions
Rule for product of fraction
Golden rule of fraction
Rule of quotient of Fraction
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Question # 3
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Question # 4
The product of complex numbers (a,b) and (c,d) is
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(ac, bd)
(ac-bd, ad+bc)
(ab,cd)
(ac+bd,ad-bc)
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Question # 5
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Reflexive property
Symmetric property
Transitive property
Additive property
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Question # 6
Multiplicative inverse of "1" is
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0
±1
1
{0,1}
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Question # 7
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Reflexive property
Symmetric property
Cancellations property w.r.t. addition
Transitive property
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Question # 8
∀x, y ∈ R, either x = y or x > y or x < y is
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Transitive property
Reflexive property
Trichotomy property
None of these
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Question # 9
6 is
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A prime integar
An irrational number
A rational number
An odd integer
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Question # 10
For each real number, there is a number which is its
Choose an answer
Negative
Possitive
Opposite
Similar
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Question # 11
i
3
=
Choose an answer
-1
i
-i
1
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Question # 12
In R the number of identity elements w.r.t.'.' is
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One
Two
Three
Four
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Question # 13
i
2
=
Choose an answer
1
2
-1
0
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Question # 14
The additive identity of real number is
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1
2
1/2
0
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Question # 15
0.25 is ______
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An irrational number
A natural number
A prime number
A rational number
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Question # 16
The value of x, and y, when (x + iy)
2
= 5 + 4i
Choose an answer
X = 2, y = 1
X = -2, y = 1
X = 2, y = -1
X = 2, y = 2
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Question # 17
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 # 18
√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 # 19
The additive inverse of 1 is
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1
-1
0
Does not exist
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Question # 20
The set { 1 , -1} is closed w.r.t.
Choose an answer
Addition
Multiplications
Subtraction
None of these
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Question # 21
1/3 is ______
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A prime number
An integer
A rational number
An irrational number
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Question # 22
It is not possible to find the exact value of
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π
√9
∛27
√1
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Question # 23
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Commutative law of multiplication
Closure law of multiplication
Associative law of multiplication
Multiplication identity
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Question # 24
Choose an answer
a = a
a < a
a > a
a
2
= a
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Question # 25
i
101
=
Choose an answer
i
i
2
-i
-1
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Question # 26
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Question # 27
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Principle of equality of fractions
Rule for product of fractions
Golden rule for fractions
Rule for quotient of fractions
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Question # 28
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Question # 29
Choose an answer
(x, y)
(kx, y)
(x, ky)
(kx, ky)
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Question # 30
What is the conjugate of -7 -2i?
Choose an answer
-7 + 2i
7 + 2i
7 -2i
None of these
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