Daily Practice - Higher Plus
Grades 8-9 - exam-stretch algebra, geometry and reasoning.
13th August 1997
- 1Conditional Probability3 marks
A bag holds 8 red and 4 blue counters. Two are taken without replacement. Given the first was red, what is the probability the second is blue?
- 2Histograms3 marks
On a histogram the bar for 0 < x <= 20 has a frequency density of 1.5. How many values are in that class?
- 3Bounds3 marks
A rectangle is 6 cm by 17 cm, each correct to the nearest cm. Work out the upper bound of its area.
- 4The Nth Term of a Quadratic Sequence2 marks
A quadratic sequence starts 11, 24, 45, 74. Work out the second difference, and the coefficient of n^2.
- 5Velocity Time Graphs2 marks
A train slows steadily from 28 m/s to rest in 4 seconds. Work out its deceleration.
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