Daily Practice - Higher Plus
Grades 8-9 - exam-stretch algebra, geometry and reasoning.
3rd April 2013
- 1Probability Equation Questions3 marks
A bag holds 12 counters, r of them red. Two are taken without replacement and P(both red) = 5/33. Work out r.
- 2Histograms3 marks
On a histogram the bar for 0 < x <= 5 has a frequency density of 1.2. How many values are in that class?
- 3Bounds3 marks
A rectangle is 14 cm by 9 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 8, 22, 44, 74. Work out the second difference, and the coefficient of n^2.
- 5Velocity Time Graphs2 marks
A train slows steadily from 23 m/s to rest in 5 seconds. Work out its deceleration.
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