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Class 9–10 Maths quiz — 23 October 2026

Questions and answers from this day. Play today's quiz to build your streak.

Question 1 · Quadratic equations

What is the larger root of x² − 6x + 8 = 0?

  1. A. 2
  2. B. 4 ✓
  3. C. 8
  4. D. 6

Answer: 4. x² − 6x + 8 = (x − 4)(x − 2) = 0, so the roots are 4 and 2. The larger is 4.

Question 2 · Arithmetic progressions

The first term of an AP is 15 and the common difference is 7. What is its 18th term?

  1. A. 148
  2. B. 134 ✓
  3. C. 127
  4. D. 123

Answer: 134. nth term = a + (n − 1)d = 15 + 17 × 7 = 134.

Question 3 · Mensuration

A cylinder has a radius of 7 cm and a height of 14 cm. What is its volume? (Use π = 22/7)

  1. A. 2310 cm³
  2. B. 4312 cm³
  3. C. 2156 cm³ ✓
  4. D. 308 cm³

Answer: 2156 cm³. Volume = π r² h = 22/7 × 7 × 7 × 14 = 2156 cm³.

Question 4 · Algebraic identities

If a + b = 11 and ab = 30, what is a² + b²?

  1. A. 60
  2. B. 63
  3. C. 121
  4. D. 61 ✓

Answer: 61. (a + b)² = a² + 2ab + b², so a² + b² = 11² − 2 × 30 = 121 − 60 = 61.

Question 5 · Linear equations

If x + y = 12 and x − y = 4, what is x?

  1. A. 4
  2. B. 8 ✓
  3. C. 12
  4. D. 9

Answer: 8. Add the two equations: 2x = 12 + 4 = 16, so x = 8.

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