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Online Tests
ECAT Pre General Science Mathematics Online Test MCQs With Answers
Question # 1
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0
1
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Question # 2
The set of natural no. is closed under
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multiplication
subtraction
difference
division
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Question # 3
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(1, 3)
(-1, -3)
(1, -3)
(-1, 3)
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Question # 4
Multiplicative inverse of 0 is
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0
1
±1
Does not exist
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Question # 5
22.5°=______
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Question # 6
The principal value of sin-1√(3/2) is
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-π/3
π/3
2π/3
π/2
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Question # 7
In R, the additive identity is
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0
1
-1
None
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Question # 8
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2 b
2 a
2 ab
a + b
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Question # 9
The positive real number which is the measure of the length of a vector is called the
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Unit vector
Modulus
Inverse
None of these
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Question # 10
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c = 0
c = -1
c = -2
c = 1
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Question # 11
The solution of differential equation:
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dy/dx+y/x = x
2
is :
4xy = x
4
+ c
4x = x
4
= c
4 y = x
4
+ c
4x=4x
3
+ c
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Question # 12
4/√49 is a
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Irrational Number
Prime Number
Rational number
Whole number
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Question # 13
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Question # 14
A subset of set of complex number whose elements are of the form (a,0) is called
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Real number
Complex number
Rational number
Irrational number
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Question # 15
A tower subtends an angle
α
at a point on the same level as the root of the tower and at a second point, b meters above the first, the angle of depression of the foot of the tower is
β
. The height of the tower is
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b cot
α
tan
β
b tan
α
tan
β
b tan
α
cot
β
None of these
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Question # 16
The locus of the point of intersection of tangents to an ellipse at two points, sum of whose eccentric angles is constant is
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A parabola
A circle
An ellipse
A st. line
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Question # 17
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Question # 18
The value of cos(cos-1 1/2) is
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1/2
√3/2
-1/2
1/√2
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Question # 19
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Question # 20
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3
6
0
None of these
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Question # 21
Roots of the equation 2x
2
- 7x + 3 = 0 are
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Rational
Irrational
Complex
None of these
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Question # 22
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sec 3x + c
- cosec 3x + c
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Question # 23
sin (2
π
-
θ
)
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cos
θ
sin
θ
tan
θ
-sin
θ
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Question # 24
Two coins are tossed twice each. The probability that the head appears on the first toss and the same forces appear in the two tosses is
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1/4
1/2
1/3
1/7
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Question # 25
Three right angles is the angle of measure
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270°
180°
90°
270'
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Question # 26
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Question # 27
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1
7
4
None of these
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Question # 28
(0.90)
1/2
is equal to
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0.99
0.90
0.80
0.88
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Question # 29
The set of whole numbers is subset of
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The set on integers
The set of natural numbers
{1, 3, 5, 7, ....}
The set of prime numbers
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Question # 30
A and B throw a dice. The probability that A's throw is not greater then B's is
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5 / 12
7 / 12
1 / 6
1 / 2
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Question # 31
{1, 2, 3, 4,.....} is set of ______
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Natural numbers
Whole numbers
Integers
Rational numbers
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