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Online Tests

Mathematics ECAT Pre Engineering Online Test MCQs With Answers

Question # 1

How many different 5-digit even numbers are possible form digit 1,2,4,6,8

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4 : 4!

4!

5!

4!+4!

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Question # 2

The5thand 13th terms of an A.P are 5 and-3 respectively The first term of the A.P is

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1

-15

9

2

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Question # 3

Cofactor of an element a_ijis defined by

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(-1)^i+j|A|

(-1)^i+jM_ij

(-1)^i+jM^-1

None of these

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Question # 4

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Question # 5

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5 / 12

3 / 8

5 / 8

7 / 4

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Question # 6

The square of the distance between two points P(x₁, y₁) and Q(x₂, y₂) is

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Question # 7

Decimal part of irrational number is

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Terminating

Repeating only

Neither repeating nor terminating

Repeating and terminating

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Question # 8

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Question # 9

The projections of a line segment on x, y, z axes are 12, 4, 3. The length and the direction cosines of the line segment are

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Question # 10

If n is odd then the middle terms in the expansion of (a + x)ⁿare

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Question # 11

The velocity and acceleration at any point t of a particle which moves along straight line x = 5r-3

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5,3

5,-3

5,0

10,0

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Question # 12

Matrices are represented by

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Natural numbers

Real numbers

Small letters

Capital letters

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Question # 13

The complement of set A relative to universal set U is the set

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Question # 14

In (x + iy) x is the known as

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Imaginary part of complex number

Real part of complex number

Complex number

None of above

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Question # 15

45° = ______

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Question # 16

The period of 3 sin x is

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2π

9π

3π

5π

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Question # 17

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Question # 18

w¹¹= ______

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0

1

w

w²

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Question # 19

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Question # 20

{x|x∈R∧x≠x} is a

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Infinite set

Null set

Finite set

None of these

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Question # 21

In order of A is m x n and order of B is n x p then order of AB is

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m x m

n x n

m x p

p x m

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Question # 22

The set {0,-1} hold closure property under

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Addition

Both a & c

Multiplication

None of these

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Question # 23

In the function f: A⟶B, the elements of a are called

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Images

Pre-images

ranges

Parameters

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Question # 24

Two sets A and B are said to be disjoint if

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Question # 25

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Question # 26

The order axioms are satisfied by set of

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C

C and R

R

None of these

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Question # 27

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x³⁹

40x³⁹

40x⁴¹

none of these

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Question # 28

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Question # 29

sin(180° -θ)=

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cosθ

-cosθ

Tanθ

Sinθ

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Question # 30

In quadratic equation, if the replacement of y with -y leaves the equation unchanged, then the graph is

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Straight line

Circle

Hyperbola

Symmetric w.r.t.0

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Question # 31

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3K

K2

K3

K

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