Daily Practice

Higher Plus

16th December 1987

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

1
Probability Equation Questions3 marks
A bag holds 5 counters, r of them red. Two are taken without replacement and P(both red) = 1/10. Work out r.
2
Histograms3 marks
On a histogram the bar for 10 < x <= 15 has a frequency density of 0.4. How many values are in that class?
3
Bounds3 marks
A rectangle is 10 cm by 16 cm, each correct to the nearest cm. Work out the upper bound of its area.
4
Algebraic Fractions3 marks
Write 3/(x - 4) + 5/(x - 5) as a single fraction.
5
Velocity Time Graphs2 marks
A train slows steadily from 16 m/s to rest in 4 seconds. Work out its deceleration.

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