Daily Practice - Higher Plus
Grades 8-9 - exam-stretch algebra, geometry and reasoning.
24th October 1997
- 1Probability Equation Questions3 marks
A bag holds 8 counters, r of them red. Two are taken without replacement and P(both red) = 3/14. Work out r.
- 2Histograms3 marks
On a histogram the bar for 50 < x <= 70 has a frequency density of 0.4. How many values are in that class?
- 3Surds3 marks
Rationalise the denominator of 121/sqrt(11), giving your answer in its simplest form.
- 4The Nth Term of a Quadratic Sequence3 marks
Work out the nth term of the quadratic sequence -1, 0, 5, 14, ...
- 5Velocity Time Graphs2 marks
A train slows steadily from 15 m/s to rest in 5 seconds. Work out its deceleration.
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