Daily Practice - Higher Plus
Grades 8-9 - exam-stretch algebra, geometry and reasoning.
11th January 2015
- 1Conditional Probability3 marks
A bag holds 7 red and 3 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 40 < x <= 60 has a frequency density of 1.5. How many values are in that class?
- 3Bounds3 marks
x = 30 and y = 5, each correct to the nearest whole number. Work out the upper bound of x - y.
- 4Rearranging Harder Formulae3 marks
Make x the subject of 2x + 6 = y(x + 6).
- 5Velocity Time Graphs2 marks
A train slows steadily from 39 m/s to rest in 5 seconds. Work out its deceleration.
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