Class 9–10 Maths quiz — 11 November 2026

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

Question 1 · Algebraic identities

If a + b = 13 and ab = 22, what is a² + b²?

Answer: 125. (a + b)² = a² + 2ab + b², so a² + b² = 13² − 2 × 22 = 169 − 44 = 125.

Question 2 · Quadratic equations

Answer: 8. x² − 12x + 32 = (x − 8)(x − 4) = 0, so the roots are 8 and 4. The larger is 8.

Question 3 · Arithmetic progressions

Answer: 178. nth term = a + (n − 1)d = 7 + 19 × 9 = 178.

Question 4 · Linear equations

Answer: 10. Add the two equations: 2x = 17 + 3 = 20, so x = 10.

Question 5 · Trigonometry

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

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