Daily Practice

Higher Plus

25th April 1986

5 questions · 14 marks · Grades 8-9 · 51 question types in this band

1
Probability Equation Questions3 marks
A bag holds 6 counters, r of them red. Two are taken without replacement and P(both red) = 2/5. Work out r.
2
Histograms3 marks
On a histogram the bar for 30 < x <= 50 has a frequency density of 3.5. How many values are in that class?
3
Surds3 marks
Rationalise the denominator of 10/sqrt(2), giving your answer in its simplest form.
4
Inverse and Composite Functions3 marks
f(x) = 4x - 5. Work out the inverse function f^-1(x).
5
Velocity Time Graphs2 marks
A train slows steadily from 34 m/s to rest in 5 seconds. Work out its deceleration.

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