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Mathematics ECAT Pre Engineering Online Test MCQs With Answers
Question # 1
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Question # 2
Which element is the additive inverse of (a,b) in Complex numbers
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(a,0)
(0,b)
(a,b)
(-a,-b)
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Question # 3
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R/[0,4]
R/(0,4)
(0,4)
[0,4]
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Question # 4
If (0, 0) and (-1, 0) are end points of a diameter, then the equation of the circle is
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Question # 5
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Question # 6
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Question # 7
If for the matrix A, A
5
= I, then A
-1
=
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A
2
A
3
A
None of above
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Question # 8
A series consisting of an unlimited number of terms is termed as an
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Finite sequence
Infinite sequence
Infinite series
geometric sequence
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Question # 9
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Associative law of addition
Commutative law of addition
Additive identity
Closure law of addition
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Question # 10
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Question # 11
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5
10
20
30
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Question # 12
The set { {a,b} } is
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Infinite set
Singleton set
Two points set
Empty set
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Question # 13
Given two independent event A and B such that P(A) = 0.30 and P(B) = 0.60. Probability of getting neither A nor B is
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0.28
0.13
0.12
0.42
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Question # 14
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Question # 15
Union of the sets of rational and irrational numbers is called 6th set of
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Natural numbers
Real numbers
Whole numbers
Prime numbers
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Question # 16
The transpose of a zero matrix is a ______
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Column matrix
Zero matrix
Row matrix
Scalar matrix
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Question # 17
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A
B
A'
None of these
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Question # 18
The zero vector is
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[0, 0, 0]
[1, 1, 1]
[0, 1, 0]
[0, 0, 1]
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Question # 19
Domain of 2 cos x is ______
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[-2, 2]
R
Negative real numbers
None of these
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Question # 20
A statement which is either true or false is called
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Induction
Deduction
Propositicon
Logic
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Question # 21
If A = |aij| is (m x n) matrix then transpose of A is of the order
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m x m
m x n
n x n
n x m
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Question # 22
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 # 23
E-radius corresponding to < B is
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Question # 24
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cos x
- sin x
- cos x
tan x
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Question # 25
Digit in the unit place of the number 183! + 3
183
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7
6
3
0
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Question # 26
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-1
0
1
None of these
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Question # 27
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Question # 28
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An empty set
Universal set
A singleton set
None of these
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Question # 29
Multiplicative inverse of 0 is
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0
1
±1
Does not exist
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Question # 30
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Question # 31
Given X.Y are any two sets such that number of elements in X = 18, number of elements in set Y = 24,and number of elements in set X∪ Y =40,then number of elements in set x∩ Y =
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3
1
2
4
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