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This mock test of JEE Main Mathematics Mock - 3 for JEE helps you for every JEE entrance exam.
This contains 25 Multiple Choice Questions for JEE JEE Main Mathematics Mock - 3 (mcq) to study with solutions a complete question bank.
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QUESTION: 1

if the pair of lines ax^{2} + 2hxy + by^{2} + 2gx + 2fy + c = 0

Solution:

QUESTION: 2

The circle x^{2} + y^{2} - 8x + 4y + 4 = 0 touches

Solution:

QUESTION: 3

The foci of the ellipse 25(x+1)^{2} + 9(y+2)^{2} = 225 are

Solution:

QUESTION: 4

The product of all roots of is

Solution:

QUESTION: 5

In determinant radio of the cofactor of -3 and subdeterminant is

Solution:

QUESTION: 6

The differential equation of the family of lines passing through the origin is

Solution:

QUESTION: 7

Log (x + y) - 2xy = 0, then y (0) =

Solution:

QUESTION: 8

The area bounded by the curve y = x^{2} - 4x, x-axis and line x = 2 is

Solution:

QUESTION: 9

If f: R → R and g : R → R defined by f(x) = 2x + 3 and g(x) = x^{2} + 7, then the value of x for which f(g(x)) = 25 are

Solution:

QUESTION: 10

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-

Assertion(A): f (x) = log x^{3} and g (x) = 3 log x are equal .

Reason(R) : Two functions f and g are said to be equal if their domains, ranges are equal and f (x) = g (x) ∀ x in the domain .

Solution:

QUESTION: 11

Which of the following statements are true ?

(1) The amplitude of the product of complex numbers is equal to the product of their amplitudes.

(2) For any polynomial f(x) =0 with real co-efficients, imaginary roots occurs in conjugate paris.

(3) Order relation exists in complex numbers whereas it does not exist in real numbers.

(4) The value of ω used as a cube root of unity and as a fourth root of unity are different.

Solution:

QUESTION: 12

A tangent is drawn at the point (3√3 cos θ, sin θ) 0 < θ < (π/2) of an ellipse (x^{2}/27) + (y^{2}/1) = 1 the least value of the sum of the intercepts on the co-ordinate axes by this tangent is attained at θ =

Solution:

QUESTION: 13

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-

Assertion (A):

Reason (R): The non zero vectors are always linearly independent

Solution:

QUESTION: 14

How many numbers between 99 and 1000 can be formed from the digits 2,3,7,0,8,6 so that in each number each digit may occur once only?

Solution:

QUESTION: 15

The probabilities of solving a problem by three student A,B,C are 1/2, 1/3, 1/4 respectively. The probability that problem will be solved is

Solution:

We have, probability that A can solve the problem = P(A) = 1/2 ,

And in this way P(B) = 1/3 and P(C) = 1/4.

P(A cannot solve the problem) = 1 – P(A) = 1/2 ,

P(B cannot solve the problem) = 1 – P(B) = 1 – 1/3 = 2/3,

P(C cannot solve the problem) = 1 – P(C) = 1 – 1/4 = 3/4.

P(A, B, and C cannot solve the problem) = 1/2 x 2/3 x 3/4 = 1/4.

Therefore , P(Problem will be solve) = 1 – P(Problem is not solved by any of them)

= 1 – 1/4 = 3/4

QUESTION: 16

If two dice are thrown, find the probability of getting an odd number of on one and multiple of 3 on the other is

Solution:

QUESTION: 17

If the roots of ax^{2} + bx + c = 0 are α,β and roots of Ax^{2} + Bx + C = 0 are α + K, β + K, then B^{2} - 4AC/b^{2} - 4ac is equal to

Solution:

QUESTION: 18

Let f(x) be a polynominal function of second degree,If f(1) = f(-1) and a,b,c are in A.P., then f'(a),f'(b) and f'(c) are in

Solution:

QUESTION: 19

The total expenditure incurred by an industry under different heads is best presented as a

Solution:

QUESTION: 20

The orthocentre of a triangle whose vertices are [(2),((√3-1)/2)], ((1/2),-(1/2)) and (2,-(1/2)) is

Solution:

*Answer can only contain numeric values

QUESTION: 21

A house of height 100 m subtends a right angle at the window of an opposite house. If the height of the window be 64 m, then the distance between the two houses is

Solution:

*Answer can only contain numeric values

QUESTION: 22

The value of is :-

Solution:

*Answer can only contain numeric values

QUESTION: 23

The area (in sq. units) of the region A = is :-

Solution:

*Answer can only contain numeric values

QUESTION: 24

A line makes α/2, β/2, γ/2 angles with positive direction of coordinate axes then cosα + cosβ + cosγ equals-

Solution:

*Answer can only contain numeric values

QUESTION: 25

If a, b and c are perpendicular to b + c, c + a and a + b respectively and if |a + b| = 6, |b + c| = 8 and |c + a| = 10 then |a + b + c| =

Solution:

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