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CBSE Class 10 Maths Basic 2025 Question Paper 430/3/1 with Solutions

All 44 questions from the CBSE Class 10 Mathematics Basic board paper, Set 430/3/1 (2025), with answers and step-by-step solutions. Total 80 marks. Tap “Show answer & solution” under any question.

Set 430/1/1Set 430/1/2Set 430/1/3Set 430/2/1Set 430/2/2Set 430/2/3Set 430/3/1Set 430/3/2Set 430/3/3Set 430/4/1Set 430/4/2Set 430/4/3Set 430/5/1Set 430/5/2Set 430/5/3Set 430/6/1Set 430/6/2Set 430/6/3
Q11 markMCQReal Numbers

If and , then the LCM of and is :

  1. (A)
  2. (B)
  3. (C)
  4. (D)
Show answer & solution
Answer: (D)
  1. LCM = product of the highest powers of all prime factors.
  2. Highest powers: , and .
  3. LCM .
Q21 markMCQReal Numbers

, where is a natural number, cannot end with the digit :

  1. (A)3
  2. (B)5
  3. (C)7
  4. (D)9
Show answer & solution
Answer: (B) 5
  1. The only prime factor of is 3.
  2. A number ending in 5 must be divisible by 5, so can never end with 5.
  3. (The last digits of cycle through 3, 9, 7, 1.)
Q31 markMCQReal Numbers

A prime number has :

  1. (A)exactly two prime factors
  2. (B)exactly one prime factor
  3. (C)at least one prime factor
  4. (D)at least two prime factors
Show answer & solution
Answer: (B) exactly one prime factor
  1. A prime number has only the factors 1 and .
  2. 1 is not prime, so its only prime factor is itself.
  3. Hence a prime number has exactly one prime factor.

For what value(s) of does the system of equations and have a unique solution ?

  1. (A) = a real number
  2. (B)
  3. (C)
  4. (D)
Show answer & solution
Answer: (C)
  1. For a unique solution, .
  2. , so .

If , is expressed as a quadratic equation in the form , then the value of is :

  1. (A)0
  2. (B)1
  3. (C)2
  4. (D)3
Show answer & solution
Answer: (A) 0
  1. Squaring both sides: , i.e. .
  2. So , , .
  3. .

If point is the mid-point of the line segment joining the points and , then

  1. (A)
  2. (B)
  3. (C)
  4. (D)
Show answer & solution
Answer: (C)
  1. Mid-point: and .
  2. .
  3. .

The distance of point from y-axis is :

  1. (A)
  2. (B)3
  3. (C)4
  4. (D)5
Show answer & solution
Answer: (B) 3
  1. Distance of a point from the y-axis is .
  2. .

The value of is :

  1. (A)1
  2. (B)
  3. (C)
  4. (D)7
Show answer & solution
Answer: (B)
  1. , , so the numerator .
  2. .
  3. Value .
Q91 markMCQTriangles

Which types of triangles are always similar ?

  1. (A)Right-angled triangles
  2. (B)Acute-angled triangles
  3. (C)Isosceles triangles
  4. (D)Equilateral triangles
Show answer & solution
Answer: (D) Equilateral triangles
  1. All angles of every equilateral triangle are .
  2. So any two equilateral triangles are similar (AAA). The other types need not have equal angles.
Q101 markMCQTriangles

What values of and will make similar to in the figures given below ?

Diagram for CBSE 2025 Class 10 Maths question 10
  1. (A),
  2. (B),
  3. (C),
  4. (D),
Show answer & solution
Answer: (B) ,
  1. means A ↔ Q, B ↔ R, C ↔ P.
  2. So , i.e. .
  3. cm and cm.
Q111 markMCQCircles

In the given figure, from which point can the tangent not be drawn to the circle with radius ?

Diagram for CBSE 2025 Class 10 Maths question 11
  1. (A)X
  2. (B)P
  3. (C)Q
  4. (D)Y
Show answer & solution
Answer: (D) Y
  1. No tangent can be drawn to a circle from a point inside it.
  2. Y lies inside the circle of radius ; X, P and Q lie outside it.
  3. So the answer is Y.

In the given figure, the angle of elevation of point A from point C is :

Diagram for CBSE 2025 Class 10 Maths question 12
  1. (A)
  2. (B)
  3. (C)
  4. (D)Cannot be determined
Show answer & solution
Answer: (A)
  1. In right , .
  2. So .

The angle of the sector of a circle whose area is one-eighth of the area of the circle is :

  1. (A)
  2. (B)
  3. (C)
  4. (D)
Show answer & solution
Answer: (B)
  1. .
  2. .

The perimeter of a quadrant of a circle of circumference 22 cm is :

  1. (A)29 cm
  2. (B)22 cm
  3. (C)12.5 cm
  4. (D)5.5 cm
Show answer & solution
Answer: (C) 12.5 cm
  1. cm.
  2. Perimeter of quadrant cm.

A cone and cylinder have same height and same radius. The volume of the cone and the volume of the cylinder are in the ratio :

  1. (A)1 : 1
  2. (B)1 : 3
  3. (C)3 : 1
  4. (D)1 : 2
Show answer & solution
Answer: (B) 1 : 3
  1. Volume of cone : volume of cylinder .
Q161 markMCQStatistics

The following table shows the marks scored by 23 students of a class.
Marks: 0 – 10, 10 – 20, 20 – 30, 30 – 40, 40 – 50
Number of Students: 5, 3, 4, 8, 3
The lower limit of the modal class is :

  1. (A)10
  2. (B)20
  3. (C)30
  4. (D)40
Show answer & solution
Answer: (C) 30
  1. The highest frequency is 8, for the class 30 – 40.
  2. Modal class = 30 – 40, so its lower limit is 30.
Q171 markMCQStatistics

For a distribution, if mean = 15 and mode = 12, then its median is :

  1. (A)12
  2. (B)13
  3. (C)14
  4. (D)15
Show answer & solution
Answer: (C) 14
  1. Empirical relation: .
  2. , so Median .
Q181 markMCQProbability

A pair of dice is thrown simultaneously. Let E denote the event that “The sum of numbers obtained on both dice is at least 9.” The number of outcomes in favour of event E is :

  1. (A)4
  2. (B)6
  3. (C)10
  4. (D)26
Show answer & solution
Answer: (C) 10
  1. Sum 9: (3, 6), (4, 5), (5, 4), (6, 3), which is 4 outcomes.
  2. Sum 10: (4, 6), (5, 5), (6, 4), which is 3 outcomes.
  3. Sum 11: (5, 6), (6, 5), which is 2 outcomes. Sum 12: (6, 6), which is 1 outcome.
  4. Total .
Q191 markAssertion–ReasonIntroduction to Trigonometry

Assertion (A) : For , must be 0.
Reason (R) : .

  1. (A)Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
  2. (B)Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
  3. (C)Assertion (A) is true, but Reason (R) is false.
  4. (D)Assertion (A) is false, but Reason (R) is true.
Show answer & solution
Answer: (C) Assertion (A) is true, but Reason (R) is false.
  1. A: gives , so . A is true.
  2. R: the identity is ; is not true in general (e.g. gives ). R is false.
Q201 markAssertion–ReasonQuadratic Equations

Assertion (A) : Every quadratic equation has two real roots.
Reason (R) : A quadratic polynomial can have at most two zeroes.

  1. (A)Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
  2. (B)Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
  3. (C)Assertion (A) is true, but Reason (R) is false.
  4. (D)Assertion (A) is false, but Reason (R) is true.
Show answer & solution
Answer: (D) Assertion (A) is false, but Reason (R) is true.
  1. A: has no real roots, so A is false.
  2. R: a polynomial of degree 2 has at most 2 zeroes, so R is true.

Solve the following system of equations graphically :
and

Show answer & solution
Answer: ,
  1. : points , , . Plot and join them.
  2. : a vertical line through , parallel to the y-axis.
  3. The two lines meet at .
  4. Hence , .
Q222 marksVery Short AnswerTriangles

A vertical pole of height 10 m casts a shadow of 15 m on the ground and at the same time, a tower casts a shadow of 45 m on the ground. Find the height of the tower.

Show answer & solution
Answer: 30 m
  1. At the same time the sun's rays make the same angle with the ground, so the pole–shadow triangle and the tower–shadow triangle are similar (AA).
  2. .
  3. m.
OR
Q22 (OR) (OR)2 marksVery Short AnswerTriangles

In the given figure, and . Prove that .

Diagram for CBSE 2025 Class 10 Maths question 22 (OR)
Show answer & solution
Answer: Proved.
  1. In , (), so .
  2. Given , so , i.e. .
  3. In and : and is common.
  4. Hence (SAS similarity).
Q232 marksVery Short AnswerCircles

In the given figure, TP and TQ are two tangents. If , then find the measure of .

Diagram for CBSE 2025 Class 10 Maths question 23
Show answer & solution
Answer:
  1. TP = TQ (tangents from an external point), so .
  2. (radius tangent).
  3. .
Q242 marksVery Short AnswerIntroduction to Trigonometry

If , then find the value of .

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Answer:
  1. , so and .
  2. .
OR
Q24 (OR) (OR)2 marksVery Short AnswerIntroduction to Trigonometry

If , then find the value of .

Show answer & solution
Answer:
  1. .
  2. .
  3. So , giving .
Q252 marksVery Short AnswerAreas Related to Circles

In the given figure, OPRQ is a quadrant of a circle with centre O and radius 10 cm. If OP = 10 cm and OS = 6 cm, find the area of the shaded region. (Use )

Diagram for CBSE 2025 Class 10 Maths question 25
Show answer & solution
Answer: 48.5
  1. Area of quadrant OPRQ .
  2. Area of right .
  3. Shaded area .
Q263 marksShort AnswerReal Numbers

Prove that is an irrational number.

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Answer: Proved.
  1. Suppose is rational. Then , where are integers, , and have no common factor other than 1.
  2. Squaring: , so 2 divides , hence 2 divides . Let .
  3. Then , i.e. , so 2 divides and hence 2 divides .
  4. So 2 is a common factor of and , a contradiction.
  5. Hence is irrational.
OR
Q26 (OR) (OR)3 marksShort AnswerReal Numbers

Find which among the following numbers a, b and c is/are composite numbers.


Show answer & solution
Answer: a and b are composite numbers (c = 97 is prime).
  1. , which has factors other than 1 and itself, so is composite.
  2. , so is composite.
  3. , which is not divisible by 2, 3, 5 or 7 (), so is prime.
  4. Hence and are composite.
Q273 marksShort AnswerPolynomials

Find the zeroes of the polynomial and verify the relationship between the zeroes and the coefficients of the given polynomial.

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Answer: Zeroes: ,
  1. , so the zeroes are and .
  2. Sum of zeroes and . Verified.
  3. Product of zeroes and . Verified.

A fraction becomes , when 1 is subtracted from the numerator and it becomes , when 8 is added to its denominator. Find the fraction.

Show answer & solution
Answer:
  1. Let the fraction be .
  2. ... (1)
  3. ... (2)
  4. Substituting (1) in (2): , so and .
  5. The fraction is .
OR
Q28 (OR) (OR)3 marksShort AnswerPair of Linear Equations in Two Variables

Find the value of for which the following pair of linear equations will have infinitely many solutions :
and
Hence, find any two solutions of the given pair of equations.

Show answer & solution
Answer: ; two solutions, e.g. and
  1. For infinitely many solutions: .
  2. .
  3. . So .
  4. The equations become and , both equivalent to .
  5. Two solutions: and .
Q293 marksShort AnswerIntroduction to Trigonometry

Prove that :

Show answer & solution
Answer: Proved.
  1. LHS .
  2. RHS .
  3. LHS = RHS. Hence proved.
Q303 marksShort AnswerProbability

A box contains 6 blue, 4 white and 8 red marbles. A marble is drawn at random from this box. Find the probability that the marble so drawn is :
(i) white
(ii) white or red
(iii) not red

Show answer & solution
Answer: (i) (ii) (iii)
  1. Total marbles .
  2. (i) P(white) .
  3. (ii) P(white or red) .
  4. (iii) P(not red) .
Q313 marksShort AnswerCircles

In the given figure, a circle is inscribed in a quadrilateral ABCD which touches the sides AB, BC, CD and DA at P, Q, R and S respectively. Prove that .

Diagram for CBSE 2025 Class 10 Maths question 31
Show answer & solution
Answer: Proved.
  1. Join OP, OQ, OR, OS. In and : (tangents from A), (radii), OA common, so they are congruent (SSS) and .
  2. Similarly OB, OC and OD bisect , and . Let , , , .
  3. Then , so .
  4. In : . In : .
  5. .
Q325 marksLong AnswerQuadratic Equations

Find two consecutive odd integers, sum of whose squares is 290.

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Answer: 11 and 13, or −13 and −11
  1. Let the integers be and .
  2. .
  3. , so or .
  4. The integers are 11 and 13, or and .
  5. Check: .
OR
Q32 (OR) (OR)5 marksLong AnswerQuadratic Equations

A charity trust decides to build a rectangular hall having an area of 300 . The length of the hall is one metre more than twice its width. Find the length and breadth of the hall.

Show answer & solution
Answer: Length = 25 m, breadth = 12 m
  1. Let the breadth be m; then the length is m.
  2. .
  3. .
  4. (breadth cannot be negative).
  5. Breadth = 12 m, length = m.
Q335 marksLong AnswerTriangles

State and Prove “Basic Proportionality Theorem”.

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Answer: Proved.
  1. Statement: If a line is drawn parallel to one side of a triangle to intersect the other two sides in distinct points, the other two sides are divided in the same ratio.
  2. Given: In , with D on AB and E on AC. To prove: .
  3. Construction: Join BE and CD; draw and .
  4. .
  5. .
  6. and are on the same base DE and between the same parallels DE and BC, so .
  7. Hence .
OR
Q33 (OR) (OR)5 marksLong AnswerTriangles

In the given figure, CM and RN are respectively, the medians of and . If , prove that :
(i)
(ii)
(iii)

Diagram for CBSE 2025 Class 10 Maths question 33 (OR)
Show answer & solution
Answer: Proved.
  1. Since : , , .
  2. (i) M and N are mid-points of AB and PQ, so .
  3. With , (SAS similarity).
  4. (iii) Similarly and , so (SAS similarity).
  5. (ii) From (iii), corresponding angles are equal, so .
Q345 marksLong AnswerSurface Areas and Volumes

A perfume bottle is in the form of a cylinder but the bottom of the bottle has a hemispherical raised portion to reduce the capacity of the bottle. The inner diameter of the bottle is 5 cm and the height of the bottle is 10 cm. Find the capacity of the perfume bottle in mL. (Use and 1 = 1 mL)

Diagram for CBSE 2025 Class 10 Maths question 34
Show answer & solution
Answer: mL
  1. Radius cm, height cm.
  2. Volume of cylinder .
  3. Volume of hemisphere .
  4. Capacity (approx.) mL.
Q355 marksLong AnswerStatistics

The weights of 30 students of a class are given in the following distribution table :
Weight (in kg): 40 – 45, 45 – 50, 50 – 55, 55 – 60, 60 – 65, 65 – 70
Number of students: 2, 5, 8, 6, 6, 3
Find the median weight of the students.

Show answer & solution
Answer: 55 kg
  1. Cumulative frequencies: 2, 7, 15, 21, 27, 30. , .
  2. The cumulative frequency first reaches 15 in the class 50 – 55, so the median class is 50 – 55.
  3. , , , .
  4. Median kg.
Q364 marksCase StudyArithmetic Progressions

In a society, a yoga instructor was hired to train the people of the society to live a healthy lifestyle. Yoga sessions were held daily from 5 p.m. to 7 p.m. in the society park. On day one, 5 people joined the yoga session, on day two, 3 more people joined, on day three, another 3 people joined and in this manner every next day, 3 more people kept on joining.
Based on the given information, answer the following questions :
(i) On which day did 59 people join the yoga session ? (1)
(ii) How many people joined the yoga session on the 31st day ? (1)
(iii) (a) The yoga instructor was paid ₹100 for each person attending the yoga session. On which day would he earn ₹5,000 ? (2)
OR
(b) What was the total amount earned by the yoga instructor in 16 days ? (2)

Show answer & solution
Answer: (i) 19th day (ii) 95 (iii) (a) 16th day OR (b) ₹44,000
  1. Number of people on day forms an AP: 5, 8, 11, ... with , , so .
  2. (i) . On the 19th day.
  3. (ii) people.
  4. (iii) (a) ₹5,000 ÷ ₹100 = 50 people. . On the 16th day.
  5. (iii) (b) Total attendance in 16 days . Amount .

Two motorboats A and B are waiting at the opposite banks of a river in order to reach the opposite side. From a point P on the bridge, 20 m above the river, the angles of depression of the boats are and respectively, as shown in the figure given below. Both the boats leave at the same time at the speed of 10 m/s and 5 m/s, respectively
Based on the above information, answer the following questions :
(i) Find the distance travelled by boat A to reach point D in the river, vertically below the point P. (Use ) (1)
(ii) What is the width of the river ? (1)
(iii) (a) Which boat will reach point D first, and how much earlier, than the other boat ? (2)
OR
(b) What is the distance between the two boats after 3 seconds ? (2)

Diagram for CBSE 2025 Class 10 Maths question 37
Show answer & solution
Answer: (i) 34.6 m (ii) 54.6 m (iii) (a) Boat A, 0.54 s earlier OR (b) 9.6 m
  1. PD = 20 m; angle of depression of A is , of B is , so and .
  2. (i) m.
  3. (ii) m. Width m.
  4. (iii) (a) Time for A s; time for B s. Boat A reaches D first, s earlier.
  5. (iii) (b) In 3 s, A travels 30 m and B travels 15 m towards each other. Distance between them m.
Q384 marksCase StudyCoordinate Geometry

There is a semicircular park in Aman’s society. He wishes to plant saplings along the boundary of the park. There is a borewell at the centre O of the park along the diameter AB as shown in the figure below.
Based on the above information, answer the following questions :
(i) Find the coordinates of point O. (1)
(ii) Find the radius of the semicircular park. (1)
(iii) (a) One sapling is kept at point C(12, y). Find the coordinates of C. (2)
OR
(b) One sapling is kept at point P along AB so that PA = PB. Find the coordinates of P. (2)

Diagram for CBSE 2025 Class 10 Maths question 38
Show answer & solution
Answer: (i) O(12, 3) (ii) 10 units (iii) (a) C(12, −7) OR (b) P(7, 3)
  1. A(2, 3), B(22, 3).
  2. (i) O is the mid-point of AB: .
  3. (ii) , so radius units.
  4. (iii) (a) C lies on the semicircle below AB with and the same x-coordinate as O, so . C(12, ).
  5. (iii) (b) , so . .
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