Download Central Board of Secondary Education (CBSE) Class 10th (10th Board Exam) Maths Basic 2021 Sample Paper
Mathematics-Basic (241)
Sample Question Paper 2020-21
Max. Marks: 80 Duration:3 hours
General Instructions:
1. This question paper contains two parts A and B.
2. Both Part A and Part B have internal choices.
Part ? A:
1. It consists of two sections- I and II
2. Section I has 16 questions. Internal choice is provided in 5 questions.
3. Section II has four case study-based questions. Each case study has 5 case-based sub-parts.
An examinee is to attempt any 4 out of 5 sub-parts.
Part ? B:
1. Question No 21 to 26 are Very short answer Type questions of 2 mark each,
2. Question No 27 to 33 are Short Answer Type questions of 3 marks each
3. Question No 34 to 36 are Long Answer Type questions of 5 marks each.
4. Internal choice is provided in 2 questions of 2 marks, 2 questions of 3 marks and 1 question of 5
marks.
Questi
Part-A
Marks
on No.
Section-I
1
1.
Express 156 as the product of primes.
1
2.
Write a quadratic polynomial, sum of whose zeroes is 2 and product is -8.
1
3.
Given that HCF (96,404) is 4, find the LCM ( 96,404).
OR
State the fundamental Theorem of Arithmetic.
Page 1 of 11
4
On comparing the ratios of the coefficients, find out whether the pair of
1
equations x ? 2y =0 and 3x + 4y -20 =0 is consistent or inconsistent.
5
If a and b are co-prime numbers, then find the HCF (a, b).
1
6
1
Find the area of a sector of a circle with radius 6cm if angle of the sector is
60?. (Take = 22/7)
OR
A horse tied to a pole with 28m long rope. Find the perimeter of the field where
the horse can graze. (Take = 22/7)
7
In the given fig. DE || BC, ADE =70? and BAC=50?, then angle
1
BCA = ______
OR
In the given figure, AD = 2cm, BD = 3 cm, AE = 3.5 cm and AC = 7 cm. Is DE
parallel to BC ?
Page 2 of 11
8
The cost of fencing a circular field at the rate of Rs.24 per metre is Rs. 5280.
1
Find the radius of the field.
9
A tree breaks due to storm and the broken part bends so that the top of the 1
tree touches the ground where it makes an angle 30? . The distance between
the foot of the tree to the point where the top touches the ground is 8m. Find
the height of the tree from where it is broken.
10
If the perimeter and the area of a circle are numerically equal, then find the
1
radius of the circle
11
Write the empirical relationship among mean, median and mode.
1
12
To divide a line segment BC internally in the ratio 3 : 5, we draw a ray BX 1
such that CBX is an acute angle. What wil be the minimum number of points
to be located at equal distances, on ray BX?
1
13
For what values of p does the pair of equations 4x + p y +8 =0 and 2x +2y +2
=0 has unique solution?
OR
What type of straight lines wil be represented by the system of equations 2x +
3y =5 and 4x + 6y = 7 ?
14
A bag contains 3 red bal s and 5 black balls. A bal is drawn at random from
1
the bag. What is the probability that the bal drawn is red?
OR
A die is thrown once. What is the probability of getting a prime number?
15
A tower stands vertically on the ground. From a point on the ground, which is
1
15m away from the foot of the tower, the angle of elevation of the top of the
tower is found to be 60?.Find the height of the tower.
16
Probability of an event E + Probability of the event E
( not E) is,_______
1
Page 3 of 11
Section-II
Case study-based questions are compulsory. Attempt any 4 sub parts
from each question. Each question carries 1 mark
17
Mathematics teacher of a school took her 10th standard students to show Red
fort. It was a part of their Educational trip. The teacher had interest in history
as wel . She narrated the facts of Red fort to students. Then the teacher said
in this monument one can find combination of solid figures. There are 2 pil ars
which are cylindrical in shape. Also 2 domes at the corners which are
hemispherical.7 smaller domes at the centre. Flag hoisting ceremony on
Independence Day takes place near these domes.
i)
How much cloth material wil be required to cover 2 big domes each of radius
1
2.5 metres? (Take = 22/7)
a) 75m2 b) 78.57m2 c) 87.47m2 d) 25.8m2
b)
ii)
Write the formula to find the volume of a cylindrical pil ar.
1
a) r2h b) rl c) r(l + r) d) 2r
iii)
Find the lateral surface area of two pil ars if height of the pil ar is 7m and
1
radius of the base is 1.4m.
a) 112.3cm2 b) 123.2m2 c) 90m2 d) 345.2cm2
iv)
How much is the volume of a hemisphere if the radius of the base is 3.5m?
1
a) 85.9 m3 b) 80 m3 c) 98 m3 d) 89.83 m3
Page 4 of 11
v)
What is the ratio of sum of volumes of two hemispheres of radius 1cm each to 1
the volume of a sphere of radius 2 cm?
a) 1:1 b) 1:8 c) 8 :1 d) 1:16
18
Class X students of a secondary school in Krishnagar have been allotted a
rectangular plot of a land for gardening activity. Saplings of Gulmohar are
planted on the boundary at a distance of 1m from each other. There is a
triangular grassy lawn in the plot as shown in the fig. The students are to sow
seeds of flowering plants on the remaining area of the plot.
Considering A as origin, answer question (i) to (v)
i)
Considering A as the origin, what are the coordinates of A?
1
a) (0,1) b) (1,0) c) (0,0) d)(-1,-1)
ii)
What are the coordinates of P?
1
a) (4,6) b)( 6,4) c) (4,5) d) (5,4)
iii)
What are the coordinates of R?
1
a) (6,5) b) (5,6) c) ( 6,0) d) (7,4)
iv)
What are the coordinates of D?
1
a) (16,0) b) (0,0) c) (0,16) d) (16,1)
v)
What are the coordinate of P if D is taken as the origin?
1
a) ( 12,2) b ) (-12,6) c) (12,3) d) (6,10)
Page 5 of 11
19
Rahul is studying in X Standard. He is making a kite to fly it on a Sunday. Few
questions came to his mind while making the kite. Give answers to his
questions by looking at the figure.
i)
Rahul tied the sticks at what angles to each other?
1
a) 30? b) 60? c) 90? d) 60?
ii)
Which is the correct similarity criteria applicable for smaller triangles at the
1
upper part of this kite?
a) RHS b) SAS c) SSA d) AAS
iii)
Sides of two similar triangles are in the ratio 4:9. Corresponding medians of
1
these triangles are in the ratio,
a) 2:3 b) 4:9 c) 81:16 d) 16:81
iv)
In a triangle, if square of one side is equal to the sum of the squares of the
1
other two sides, then the angle opposite the first side is a right angle. This
theorem is called as,
a) Pythagoras theorem b) Thales theorem
c) Converse of Thales theorem d) Converse of Pythagoras theorem
v)
What is the area of the kite, formed by two perpendicular sticks of length 6 cm 1
and 8 cm?
a) 48 cm2 b) 14 cm2 c) 24 cm2 d) 96 cm2
Page 6 of 11
20
Due to heavy storm an electric wire got bent as shown in the figure. It followed
a mathematical shape. Answer the following questions below.
i)
Name the shape in which the wire is bent
1
a) Spiral b) ellipse c) linear d) Parabola
ii)
How many zeroes are there for the polynomial (shape of the wire)
1
a) 2 b) 3 d) 1 d) 0
iii)
The zeroes of the polynomial are
1
a) -1, 5 b) -1, 3 c) 3, 5 d) -4, 2
iv)
What wil be the expression of the polynomial?
1
a) x2+2x -3 b) x2 -2x +3 c) x2 - 2x -3 d) x2 +2x+3
v)
What is the value of the polynomial if x = -1?
1
a) 6 b) -18 c)) 18 d) 0
Part ?B
All questions are compulsory. In case of internal choices, attempt
anyone.
21
Find the coordinates of the point which divides the line segment joining the
2
points (4, -3) and (8,5) in the ratio 3:1 internal y.
Page 7 of 11
OR
Find a relation between x and y such that the point (x,y) is equidistant from the
points (7,1) and (3,5)
22
2
AM
AN
In the fig. if LM II CB and LN II CD, prove that
=
MB
ND
23
A quadrilateral ABCD is drawn to circumscribe a circle. Prove that AB + CD =
2
AD + BC.
24
Draw a line segment of length 7.8 cm and divide it in the ratio 5:8. Measure
2
the two parts.
25
Given 15 cot A =8, find sin A and sec A.
2
OR
Find tan P ? cot R
Page 8 of 11
26
How many terms of the A. P : 9,17,25, .......must be taken to give a sum 636?
2
Part ?B
All questions are compulsory. In case of internal choices, attempt
anyone.
27
Prove that 3 is an irrational number.
3
28
Two tangents TP and TQ are drawn to a circle with centre O from an external
3
point T. Prove that PTQ = 2OPQ.
29
Meena went to a bank to withdraw Rs.2,000. She asked the cashier to give
3
her Rs.50 and Rs.100 notes only. Meena got 25 notes in all. Find how many
notes of Rs.50 and Rs.100 she received.
30
A box contains 90 discs which are numbered from 1 to 90. If one disc is drawn 3
at random from the box, find the probability that it bears
(i) a two-digit number
(i ) a perfect square number.
(i i) a number divisible by 5.
OR
One card is drawn from a wel shuffled deck of 52 cards. Find the probability of
getting
(i)
A king of red colour.
(i )
A spade
(i i)
The queen of diamonds
31
Metallic spheres of radi 6cm, 8cm and 10cm respectively are melted to form a 3
solid sphere. Find the radius of the resulting sphere.
Page 9 of 11
32
sin A-cosA+1
1
3
Prove that
=
sinA+cosA-1
secA-tanA
33
A motor boat whose speed in stil water is 18 km/h, takes 1 hour more to go 24 3
km upstream than to return downstream to the same spot. Find the speed of
the stream.
OR
Find two consecutive odd positive integers, sum of whose squares is 290.
Part ?B
All questions are compulsory. In case of internal choices, attempt
anyone.
34
The angles of depression of the top and bottom of a 8m tall building from the 5
top of a multi storied building are 30? and 45?, respectively. Find the height of
the multi storied building and the distance between the two buildings.
OR
A 1.2m tall girl spots a bal oon moving with the wind in a horizontal line at a
height 88.2 m from the ground. The angle of elevation of the bal oon from the
eyes of the girl at any instant is 60?.After sometime, the angle of elevation
reduces 30?.Find the distance travel ed by the bal oon during the interval.
35
The pth, qth and rth terms of an A.P. are a, b and c respectively.
5
Show that a(q ? r) + b(r-p) + c(p ? q) = 0
Page 10 of 11
36
A survey regarding the heights in (cm) of 51 girls of class X of a school was
5
conducted and the following data was obtained. Find the median height and
the mean using the formulae.
Height (in cm)
Number of Girls
Less than 140
4
Less than 145
11
Less than 150
29
Less than 155
40
Less than 160
46
Less than 165
51
Page 11 of 11
This post was last modified on 07 March 2021