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Online Tests

ECAT Mathematics Online Test MCQs With Answers

Question # 1

The unit vector along x-axis is

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none of these

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Question # 2

If x+y+z+......+2n = 2n+1-1∀n∈W,then cube root of xyz is equal to

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1

4

2

8

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Question # 3

sin(a-90°)=______;

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sina

cosa

-sinθ

-cosa

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Question # 4

the curve of the parabola y² = -4ax is symmetric with respect to

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x -axis

y - axis

Botha x and y- axis

None of thes

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Question # 5

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Question # 6

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3 x 2

2 x 3

3 x 3

2 x 2

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Question # 7

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Polynomial of degree 0

Polynomial of degree 2

Quadratic equation

None of these

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Question # 8

If p and q are two statements then their conjunction is denoted by

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Question # 9

If x,y are two positive distinct numbers then

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A>G>H

A<G<H

A=G=H

None of these

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Question # 10

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xy

y

0

x

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Question # 11

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Commutative property of addition

Closure property of addition

Additive inverse

Associative property w.r.t. to addition

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Question # 12

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Question # 13

The lines l1and l2intersect. The shortest distance between them is

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Positive

Negative

Zero

Infinity

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Question # 14

i³=

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-1

i

-i

1

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Question # 15

Tan 30° = _____

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Question # 16

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 # 17

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Question # 18

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Question # 19

To each element of a group there corresponds ............. inverse element

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Two

One

No

Three

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Question # 20

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 # 21

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Question # 22

The polar form of complex number x ≠ I y =

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r cos θ+ r sin θ

r cos θ+ is sin θ

cos θ+ r sin θ

i cos θ+ i sin θ

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Question # 23

A - B = ______

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Question # 24

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Reflexive property

Symmetric property

Transitive property

Additive property

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Question # 25

If 0 = {1,3,5.......}, then n (0) =

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99

odd integers

Even numbers

Infinite

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Question # 26

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Question # 27

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Commutative law of addition

Associative law of addition

Additive identity

Additive inverse

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Question # 28

If n(X) = 18, n(X∩Y) = 7, n(X∪ Y) = 40 then n(Y) =

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1

12

5

29

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Question # 29

πis the period of the function

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|sin x| + |sin x|

sin⁴x + cos x

sin (sin x) + sin (cos x)

None of these

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Question # 30

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2C

C³

1

0

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Question # 31

If a,βare the roots of the equation x2 - 8x + p = 0 and a2 + β2= 40,then value of p is

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8

12

10

14

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