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ECAT Mathematics Online Test MCQs With Answers
Question # 1
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A
A'
U
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Question # 2
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Question # 3
The multiplicative inverse of x such that x = 0 is
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-x
Does not exist
1/x
±1
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Question # 4
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Question # 5
The identity element with respect to subtraction is
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0
1
-1
Does not exist
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Question # 6
I is not
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Real number
Natural number
Prime Number
Whole Number
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Question # 7
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0
1
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Question # 8
The radian measure of the central angle of an arc 50 m long on a circle of radius 25 m is
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3
2
1
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Question # 9
The number of standard parabolic functions are is
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4
2
3
1
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Question # 10
A die is thrown 100 times. If getting an odd number is considered a success, the variance of the number of successes is
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50
25
10
100
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Question # 11
The maximum value of sin x + cos x is
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Question # 12
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One-one but not onto
One-one and onto
Onto but not one-one
Neither one-one nor onto
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Question # 13
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Question # 14
n(n - 1) (n - 2) .... (n - r + 1) = ______
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Question # 15
The equation of the sphere thro' the origin and making intercepts a, b, c on co-ordinate axes is
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x
2
+ y
2
+ z
2
+ ax + by + cz = 0
x
2
+ y
2
+ z
2
- 2ax - 2 by - 2 cz = 0
x
2
+ y
2
+ z
2
= a + b + c
x
2
+ y
2
+ z
2
- ax - by - cz =0
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Question # 16
A square matrix A for which A
t
= -A is called a
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Column matrix
Symmetric matrix
Skew-symmetric matrix
Row matrix
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Question # 17
Which of the following is a scalar
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weight
force
speed
momentum
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Question # 18
The multiplicative inverse of -1 in the set {1-,1} is
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1
-1
±1
0
Does not exist
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Question # 19
Period of tan 4x is ______
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Question # 20
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2
0
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Question # 21
A quadrilateral whose diagonals are perpendicular bisector of each other is
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Square
Rectangle
Rhombus
Parallelogram
Trapezium
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Question # 22
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3, -3, 11
3, 3, 11
-3, 3, -11
-3, -3, 11
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Question # 23
E-radius corresponding to < A is
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Question # 24
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2
7
8
12
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Question # 25
(x3-1/x)12
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295
495
395
722
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Question # 26
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G.P
H.P.
A.P.
No particular sequence
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Question # 27
A diagonal matrix in which the diagonal elements are equal is called a
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Null matrix
Identity matrix
Scalar matrix
Row matrix
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Question # 28
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-3
-7
1
0
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Question # 29
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Question # 30
w
11
= ______
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0
1
w
w
2
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