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Class 9–10 Maths quiz — 28 October 2026

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

Question 1 · Trigonometry

Find the value of tan 45° × cos 60°.

  1. A. 1/2 ✓
  2. B. 5/4
  3. C. 2
  4. D. 1

Answer: 1/2. Use sin 30° = ½, cos 60° = ½, tan 45° = 1, sin 90° = 1 and cos 0° = 1. tan 45° × cos 60° = 1/2.

Question 2 · AP sums

Find the sum of the first 18 terms of the AP that starts at 6 with common difference 4.

  1. A. 720 ✓
  2. B. 716
  3. C. 666
  4. D. 738

Answer: 720. Sum = n/2 × (2a + (n − 1)d) = 18/2 × (12 + 68) = 720.

Question 3 · Pythagoras theorem

A right-angled triangle has legs of 60 cm and 63 cm. How long is the hypotenuse?

  1. A. 87 cm ✓
  2. B. 123 cm
  3. C. 3 cm
  4. D. 86 cm

Answer: 87 cm. c² = 60² + 63² = 3600 + 3969 = 7569, so c = 87 cm.

Question 4 · Coordinate geometry

Find the distance between the points (4, −1) and (9, 11).

  1. A. 12
  2. B. 14
  3. C. 13 ✓
  4. D. 60

Answer: 13. Distance = √(5² + 12²) = √169 = 13.

Question 5 · Probability

A bag holds 4 red, 1 blue and 2 green balls. One ball is picked at random. What is the probability it is red?

  1. A. 3/7
  2. B. 5/7
  3. C. 4/7 ✓
  4. D. 1/7

Answer: 4/7. Probability = favourable ÷ total = 4/7.

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