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ECAT Pre General Science Mathematics Online Test MCQs With Answers
Question # 1
If n is any positive integer then n! > 2
n-1
for
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Question # 2
If P is a proposition then its negative is denoted by
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Question # 3
If the pth, qth, and rth terms of an A.P. are in G.P:., then the common ratio of the G.P. is
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Question # 4
ax + by < c is linear inequality in
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four variables
three variables
two variables
one variable
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Question # 5
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A
A'
U
None of these
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Question # 6
If z = (x,y) , then z ̅ =
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(-x,y)
(x,-y)
(-x, -y)
None of these
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Question # 7
If the angle between two vectors with magnitude 2 and 15 is 30
°
then their scalar product is
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15
30
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Question # 8
The set of integers is a subset of
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The set of natural numbers
The set of whole numbers
The set of prime numbers
The set of rational numbers
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Question # 9
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-3
-7
1
0
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Question # 10
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Question # 11
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Question # 12
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a
x
In a + c
a
x
+ c
x a
x
+ c
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Question # 13
If the radius of a circle is increased by 1 then area of circle will be
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π r2
π(r+1)2
π r2 +1
2π (r+1)
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Question # 14
5th term of a G.P. is 2, then the product of first 9 terms is
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256
128
512
None of these
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Question # 15
The magnitude of vector a 2i-7j is
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√23
√43
3
√53
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Question # 16
The equation of motion of a stone thrown vertically up wards is s = ut - 4.9t
2
the maximum height attained by it =
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Question # 17
The set of all positive even integers is
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Not a group
A group w.r.t subtraction
A group w.r.t division
A group w.r.t multiplication
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Question # 18
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Question # 19
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 # 20
The identity element of a set X with respect to intersection in P(x) is
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X
Does not exist
∅
None of these
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Question # 21
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Question # 22
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none of these
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Question # 23
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2
-2
none of these
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Question # 24
If n is not natural number, then the expansion (1 + x)
n
is valid for
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Question # 25
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Question # 26
If either A = 0 or B =0,then Ax2 +By2 +2Gx +2Fy +c =0 represents a
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Circle
Hyperbola
Ellipse
Parabola
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Question # 27
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Addition
Subtraction
Multiplication
None of these
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Question # 28
Cycle tyres are supplied in lots of 10 and there is a chance if 1 in 500 tyres to be defective. Using Poisson distribution, the approximate number of lots containing no defective tyre in a consignment of 10, 0000 lots is
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9028
9208
9802
9820
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Question # 29
If f (x) = |x|, then (0,0) is the
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Critical point
Inflection point
Stationary point
None of these
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Question # 30
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Question # 31
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none of these
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