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Sub. code 2022

NEB — GRADE X

SET D

Model Question

Optional Mathematics Question Paper SET D (Model Question)

The candidates are required to give their answers in their own words as far as practicable. The figures in the margin indicate full marks.

समय (Time) : 3 Hoursपूर्णाङ्क (Full Marks) : 75

Pass Marks : 32

सबै प्रश्नको उत्तर दिनुहोस् । (Attempt All Questions)

This model question question paper is for Class 10 Optional Mathematics, SET D (subject code 2022), carrying full marks of 75 with a pass mark of 32, to be completed within 3 Hours. Answers with step-by-step solutions are available for every question below.

Group A

1.

Objective Questions

a.
[1]

What is the vertex of the parabola having equation ?

a.

b.

c.

d.

b.
[1]

If and be the functions, then which one of the following is the notation for the composite function defined from ?

a.

poq

b.

qop

c.

p + q

d.

q - p

c.
[1]

Which one of the following is the true value of ?

a.

b.

c.

d.

d.
[1]

Which one of the following is equal trigonometric expression to ?

a.

b.

c.

d.

e.
[1]

If and are angles of a , which one of the following is equal to ?

a.

b.

c.

d.

f.
[1]

If a circle touches Y-axis with centre at , what is the diameter of the circle?

a.

b.

c.

d.

g.
[1]

What is the figure called if a plane surface cuts the cone parallel to the generator of the cone?

a.

Parabola

b.

Hyperbola

c.

Ellipse

d.

Circle

h.
[1]

The transformation which turns an object about a fixed point through a certain angle is called ........

a.

Translation

b.

Rotation

c.

Reflection

d.

Enlargement

i.
[1]

If and be two vectors perpendicular to each other, then which one of the following relations is true?

a.

b.

c.

d.

j.
[1]

Which one of the following set of numbers represents a continuous domain?

a.

Natural number

b.

Whole number

c.

Integer

d.

Real number

k.
[1]

Which of the following is the appropriate formula to calculate the third quartile?

a.

b.

c.

d.

Group B

Within Content Area

2.

A function and a polynomial are given.

a.
[1]

Write the condition for to be a factor of .

b.
[1]

Use the rational root theorem to determine the possible roots of polynomial .

3.

Functions and are given.

a.
[1]

Find the composite function .

b.
[1]

Write in the vertex form .

c.
[2]

Explain the combined transformation involved to transform the function into .

4.

Matrices and are given.

a.
[1]

Find .

b.
[1]

Find .

c.
[2]

Show the feasible region on graph of the constraints , , and .

5.

Identity is given.

a.
[1]

How can the identity be converted in the form of ?

b.
[1]

If , prove that:

6.

A ladder 10 m long is resting 10 m below the roof of the house. The angle of elevation of the roof of the house from the foot of the ladder is found to be 60°.

a.
[1]

Draw a labelled diagram showing the height of the house, ladder and angle of elevation.

b.
[2]

Find the height of the house.

7.

A conditional identity is given.

a.
[1]

Write in terms of sum or difference.

b.
[2]

If , and , verify the given identity.

c.
[1]

State any one reason why the given identity cannot be verified for , and .

8.

A straight line passes through the points and .

a.
[1]

Write the matrix that transform the point into the point .

b.
[2]

Find the angle between the line and the straight line .

9.

Given the equation of circle is .

a.
[1]

Write the equation of the circle with centre and radius 'r'.

b.
[2]

Find the centre and radius of the given circle.

c.
[2]

If any point on the circumference of the circle is , find the equation of the diameter of the circle.

10.

Points P(3, 2) and Q(4, 5) are joined by a straight line.

a.
[2]

If R denotes reflection on X-axis and T denotes translation by vector , then find the image points of the given points P and Q under the combined transformation ToR.

b.
[1]

Show the line PQ and its image line P'Q' on the same graph.

11.

The coordinates of the vertices of are given in the figure alongside. D, E and F are the midpoints of BC, AC and AB.

null

a.
[1]

Write the position vector of E in terms of position vectors of A and C.

b.
[1]

Find the position vector of F in terms of .

c.
[1]

Prove by vector method:

12.

The box plots given below show the information about the battery life of two electric cars A and B.

null

a.
[1]

From the box plots given above battery of which car has higher life in terms of median?

b.
[1]

Find the coefficient of quartile deviation of the life of battery of car A when car B has 0.29.

c.
[1]

For the family tour for a long distance to choose any one of two cars A or B from the above information, which car would you suggest to the family? Why?

13.

A function is defined as follows:

a.
[1]

Define the continuity of the functions.

b.
[1]

Find the limiting value of the function when approaches to 2.

c.
[1]

Find the value of .

d.
[1]

Find whether the function is continuous or not at . How can you justify your answer?

Group C

Cross Content Area.

14.

There is a with vertices , and and a matrix .

a.
[2]

Find the vertices of Image of under transformation by the matrix M.

b.
[1]

Find the slope of the altitude of drawn from the point A to the line BC.

c.
[1]

Is M a singular matrix? If not how can you make it singular?

d.
[2]

Rama claims, "The transformation by the matrix M and its transpose matrix are same." Do you agree with Rama's statement? Justify your answer with example.

15.

Manamaya picked up a piece of paper and cut it to make a triangle. She gave the name of the sides as AB, BC and CA and also marked the middle points of AC and AB as P and Q, respectively.

null

a.
[1]

Write the relationship between a line segment joining P and Q and the third side BC.

b.
[2]

Manamaya measured the sides PQ and CB and got CB = 2PQ. Prove this relationship by vector method.

c.
[1]

Explain with reason whether Manamaya's statement would still be true if P and Q are any points in between AC and AB.

d.
[2]

If A(2, 2), B(2, 8) and C(6, 2) are the vertices of , verify that .

16.

Rajesh is climbing a tower. The height of the tower () and the horizontal distance () are given in meters by the function . The slope of the tower is measured by .

a.
[2]

Prove that:

b.
[2]

The angle of the top of the tower is such that , based on this find the value of slope ().

c.
[2]

Using inverse function , find the horizontal distance covered by him if the height of the tower is 200 m.

d.
[1]

Rajesh says, "If the angle made by a line in a positive direction of X-axis is halved, then the slope of the line also becomes half." Using any value of and , justify his statement.

Optional Mathematics — Model Question SET DNEB Exam

Paper Overview & Analysis

SET D

Year

Model Question

Type

75

Full Marks

32

Pass Marks

3 Hours

Duration

55

Question Items

Question Type Breakdown

Short Answer44
MCQ11

Group Breakdown

Group A11 questions
Group B32 questions
Group C12 questions