Daily Practice - Higher Plus
Grades 8-9 - exam-stretch algebra, geometry and reasoning.
31st December 2013
- 1Surds3 marks
Expand and simplify (8 + sqrt(10))(8 - sqrt(10)).
- 2The Nth Term of a Quadratic Sequence2 marks
A quadratic sequence starts 12, 24, 40, 60. Work out the second difference, and the coefficient of n^2.
- 3Velocity Time Graphs2 marks
A train slows steadily from 16 m/s to rest in 5 seconds. Work out its deceleration.
- 4The Cosine Rule3 marks
A triangle has sides 14 cm, 13 cm and 9 cm. Work out the angle opposite the 14 cm side, to 1 decimal place.
- 5Probability Equation Questions3 marks
A bag holds 7 red and n blue counters. The probability of taking a red is 7/10. Work out n.
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