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Class 7–8 Maths quiz — 23 October 2026

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

Question 1 · Square roots

What is the square root of 400?

  1. A. 21
  2. B. 200
  3. C. 40
  4. D. 20 ✓

Answer: 20. 20 × 20 = 400, so √400 = 20.

Question 2 · Averages

What is the average of 30, 32, 19, 42 and 32?

  1. A. 31 ✓
  2. B. 29
  3. C. 30
  4. D. 33

Answer: 31. Add the numbers: 30 + 32 + 19 + 42 + 32 = 155. Divide by 5: 155 ÷ 5 = 31.

Question 3 · Linear equations

Solve for x: 4x + 8 = 20

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

Answer: 3. Subtract 8 from both sides: 4x = 12. Divide by 4: x = 3.

Question 4 · Triangle area

A triangle has a base of 6 cm and a height of 17 cm. What is its area?

  1. A. 68 cm²
  2. B. 45 cm²
  3. C. 204 cm²
  4. D. 51 cm² ✓

Answer: 51 cm². Area = ½ × base × height = ½ × 6 × 17 = 51 cm².

Question 5 · Simple interest

Find the simple interest on ₹6,000 at 10% per year for 5 years.

  1. A. ₹3,000 ✓
  2. B. ₹30,000
  3. C. ₹3,600
  4. D. ₹2,900

Answer: ₹3,000. Simple interest = P × R × T ÷ 100 = 6000 × 10 × 5 ÷ 100 = ₹3,000.

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