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Online Tests
ECAT Pre General Science Mathematics Online Test MCQs With Answers
Question # 1
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Question # 2
Projection of vector u along v is
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|v| cosθ
|u| cosθ
|v| sinθ
|u| sinθ
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Question # 3
The only function which is both even and odd is
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f(x) =α
f(x) = x
f(x) =0
Both A & B
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Question # 4
If y=f(x) is a function then y is called
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dependent variable
independent variable
constant
none of these
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Question # 5
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5
-5
none
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Question # 6
The roots of the equations will be equal if b
2
- 4ac is
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Positive
Negative
1
Zero
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Question # 7
Sin
-1
(-x)=
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Cos
-1
1/x
- Sin
-1
X
Cot
-1
X
None of these
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Question # 8
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1
0
3
-1
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Question # 9
In one hour, the hour hand of a clock turns through
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Question # 10
If n € N , then n(n+3) is always
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Multiple of 3
Multiple of 6
odd
even
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Question # 11
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2C
C
3
1
0
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Question # 12
For each even natural number n (n
2
-1) is divisible by
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6
3
4
8
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Question # 13
The two lines y = 2x and x =2y are
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Parallel
Perpendicular
Equally inclined with axes
Congruent
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Question # 14
(√3+√5)+√7 = √3 +(√5 +√7) property used in above is
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Commutative property of addition
Closure property of addition
Additive inverse
Associative property w.r.t to adition
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Question # 15
To each element of a group there corresponds ______ inverse element
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Two
One
No
Three
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Question # 16
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Question # 17
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none of these
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Question # 18
In common logarithm the base is
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1
0
10
e
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Question # 19
In one hour the minute hand of a clock turns through
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Question # 20
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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Question # 21
{0} is a
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Empty set
Singleton set
Zero set
Null Set
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Question # 22
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 # 23
If the flag-staff 6 meters high placed on the top of a tower. Makes the shadow 2√3 m on the ground, then the angle of elevation of the sun is
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30
ο
35
ο
45
ο
60
ο
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Question # 24
Such fraction which can not be written in the form ofp⁄q where p,q and q≠ 0,such fractions are called.
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Fractinal numbers
Rational Numbers
Even Numbers
Whole Numbers
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Question # 25
The transpose of a column matrix is a ______
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Zero matrix
Diagonal matrix
Column matrix
Row matrix
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Question # 26
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Question # 27
(ABC)' =
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CBA'
CBA
C' B' A'
None of these
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Question # 28
The point (x
1
, y
1
) lies outside the circle x
2
+ y
2
+ 2gx + 2fy + c =0 if
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Question # 29
How many 6-Digit number can be formed without repairing any digit from the digits 0,1,2,3,4,5
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720
600
120
6-5!
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Question # 30
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x-axis
y-axis
z-axis
None of these
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Question # 31
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none of these
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