Questions and answers from this day. Play today's quiz to build your streak.
Question 1 · Coordinate geometry
Answer: 29. Distance = √(20² + 21²) = √841 = 29.
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 · Probability
Answer: 1/6. Probability = favourable ÷ total = 1/6.
Question 4 · Trigonometry
Answer: 1. Use sin 30° = ½, cos 60° = ½, tan 45° = 1, sin 90° = 1 and cos 0° = 1. sin 30° + cos 60° = 1.
Question 5 · Pythagoras theorem
Answer: 39 cm. c² = 15² + 36² = 225 + 1296 = 1521, so c = 39 cm.
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