Questions and answers from this day. Play today's quiz to build your streak.
Question 1 · AP sums
Answer: 217. Sum = n/2 × (2a + (n − 1)d) = 14/2 × (18 + 13) = 217.
Question 2 · Probability
Answer: 1/7. Probability = favourable ÷ total = 1/7.
Question 3 · Quadratic equations
Answer: 9. x² − 17x + 72 = (x − 9)(x − 8) = 0, so the roots are 9 and 8. The larger is 9.
Question 4 · Arithmetic progressions
Answer: 66. nth term = a + (n − 1)d = 14 + 13 × 4 = 66.
Question 5 · Coordinate geometry
Answer: 10. Distance = √(6² + 8²) = √100 = 10.
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