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ECAT Pre General Science Mathematics Online Test MCQs With Answers
Question # 1
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Question # 2
If A⊆ B, and B is a finite set, then
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n (a) < n(B)
n(B)<(A)
n(A)≤ n (B)
n(A)≥ n(B)
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Question # 3
The number of permutation that can be formed from the letters of the word OBJECT is
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700
600
720
620
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Question # 4
Digit in the unit place of the number 183! + 3
183
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7
6
3
0
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Question # 5
The angle between the vectors 3i + j - k and 2i - j + k is
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Question # 6
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Question # 7
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Question # 8
Optimize means ______ a quantity under certain constraints
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Minimize
Maximize
Maximize or minimize
None of these
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Question # 9
The seventh term of (x3+1/x)8is
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71
-22
27
28
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Question # 10
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cosec x + c
-cosec x + c
-sec x + c
sec x + c
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Question # 11
The 60th part of one minute is called
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Degree
Second
Radiam
None of these
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Question # 12
What is the conjugate of -7 -2i ?
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-7 + 2i
7 +2i
7 -2i
√53
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Question # 13
The extraction of cube root of a given number is a
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Unary Operation
Binary Operation
Relation
None of these
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Question # 14
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0
1
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Question # 15
The square roots of negative numbers is called
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Real no
Complex no
Positive no
Negative no
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Question # 16
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none of these
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Question # 17
Power set of X i.e P(X)..........under the binary operation of union U
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Forms a group
Does not form a group
Has no identity element
Infinite set although X is infinite
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Question # 18
If a variable y dependents on a variable x in such a way that each value of x determines exactly one value of y, then we say that
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x is function of y
y is a function of x
y is independent variable
x is real valued function
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Question # 19
The point of concurrency of the angle bisectors of a triangle is called
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incentre
circumcentre
e-centre
centroid
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Question # 20
The period of|sin2x| is
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π/2
-π/2
π
π/3
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Question # 21
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0
-1
1
2
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Question # 22
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n
C
r
n+1
C
r+1
n
C
r+1
None
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Question # 23
The familiar plane curves, namely circle, ellipse, parabola and hyperbola are called:
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cones
conics
nappes
apex
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Question # 24
120°=______
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Question # 25
The vector i = [1,0] is called unit vector along:
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x-axis
y - axis
z- axis
Botha a and y-axis
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Question # 26
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Question # 27
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Question # 28
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Question # 29
What is the conjugate of -6 -i
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-6 +i
6 + i
-6 -i
6 -i
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Question # 30
The point which divides the line segment joining the points (a, b) and (c, d) in the ratio 2 : 3 internally is
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none of these
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Question # 31
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