Class 8 Mathematics – Daily Revision MCQ (English Medium)

📅 27 October 2026 · 10 questions · from the Balbharati textbook

Timed quiz: 15 seconds per question, the next one loads by itself when time runs out. Or solve without the timer: tap an option, right turns green, wrong turns red. New sets are added regularly.

1. What are the factors of x² − 9x + 20?

   Chapter 6: Factorisation of Algebraic expressions

   • A(x − 4)(x − 5)
   • B(x + 4)(x + 5)
   • C(x − 2)(x − 10)
   • D(x − 4)(x + 5)
   Show answer

   Answer: A. (x − 4)(x − 5)
   We need two numbers whose sum is −9 and product is 20: −4 and −5, so x² − 9x + 20 = (x − 4)(x − 5).

2. Which of these is the correct factorisation of a³ + b³?

   Chapter 6: Factorisation of Algebraic expressions

   • A(a + b)(a² + ab + b²)
   • B(a + b)(a² − ab + b²)
   • C(a − b)(a² + ab + b²)
   • D(a + b)(a + b)(a + b)
   Show answer

   Answer: B. (a + b)(a² − ab + b²)
   The book derives a³ + b³ = (a + b)(a² − ab + b²); (a − b)(a² + ab + b²) is a³ − b³.

3. One angle of a parallelogram measures 70°. What is the measure of an angle adjacent to it?

   Chapter 8: Quadrilateral : Constructions and Types

   • A70°
   • B110°
   • C90°
   • D20°
   Show answer

   Answer: B. 110°
   Adjacent angles of a parallelogram are supplementary: 180° − 70° = 110°.

4. The diagonals of a rhombus are 10 cm and 24 cm long. What is the length of each side?

   Chapter 8: Quadrilateral : Constructions and Types

   • A12 cm
   • B17 cm
   • C26 cm
   • D13 cm
   Show answer

   Answer: D. 13 cm
   The diagonals are perpendicular bisectors of each other, so side² = 5² + 12² = 169 and side = 13 cm.

5. When x² + 7x + 10 is divided by x + 2, what is the quotient? (The remainder is 0.)

   Chapter 10: Division of Polynomials

   • Ax − 5
   • Bx + 3
   • Cx + 5
   • Dx + 8
   Show answer

   Answer: C. x + 5
   (x + 2)(x + 5) = x² + 7x + 10, so the quotient is x + 5 and the remainder is 0.

6. What is the mean of 12, 15, 18, 21 and 24?

   Chapter 11: Statistics

   • A18
   • B15
   • C20
   • D21
   Show answer

   Answer: A. 18
   Sum = 90 and there are 5 scores, so mean = 90 ÷ 5 = 18.

7. Solve: 5x − 7 = 2x + 8. What is x?

   Chapter 12: Equations in one variable

   • A3
   • B−5
   • C5
   • D15
   Show answer

   Answer: C. 5
   Subtract 2x and add 7 on both sides: 3x = 15, so x = 5 (check: 25 − 7 = 18 = 10 + 8).

8. Which of these is NOT a test for congruence of triangles?

   Chapter 13: Congruence of triangles

   • ASAS
   • BSSS
   • CASA
   • DAAA
   Show answer

   Answer: D. AAA
   The tests are SAS, SSS, ASA, AAS and hypotenuse-side; three equal angles alone do not make triangles congruent.

9. The parallel sides of a trapezium are 9 cm and 13 cm, and the distance between them is 5 cm. What is its area?

   Chapter 15: Area

   • A110 sq cm
   • B55 sq cm
   • C65 sq cm
   • D45 sq cm
   Show answer

   Answer: B. 55 sq cm
   Area = ½ × (9 + 13) × 5 = ½ × 22 × 5 = 55 sq cm.

10. Using Heron's formula, what is the area of a triangle with sides 3 cm, 4 cm and 5 cm?

    Chapter 15: Area

    • A12 sq cm
    • B7.5 sq cm
    • C6 sq cm
    • D10 sq cm
    Show answer

    Answer: C. 6 sq cm
    s = (3 + 4 + 5) ÷ 2 = 6; area = √(6 × 3 × 2 × 1) = √36 = 6 sq cm.

Class 8: MCQ in other subjects

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• 26 October 2026

All questions are written by PadhaiNotes in our own words from the chapters of the official Maharashtra State Board Balbharati textbook (ebalbharati.in). Each question shows its chapter.