Daily Practice - Higher Plus
Grades 8-9 - exam-stretch algebra, geometry and reasoning.
- 1Probability Equation Questions3 marks
A bag holds 11 counters, r of them red. Two are taken without replacement and P(both red) = 3/11. Work out r.
- 2Histograms3 marks
On a histogram the bar for 20 < x <= 40 has a frequency density of 2.4. How many values are in that class?
- 3Surds3 marks
Rationalise the denominator of 66/sqrt(11), giving your answer in its simplest form.
- 4Inverse and Composite Functions3 marks
f(x) = 4x + 1. Work out the inverse function f^-1(x).
- 5Velocity Time Graphs2 marks
A train slows steadily from 15 m/s to rest in 4 seconds. Work out its deceleration.
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