Daily Practice

Higher Plus

21st January 1981

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

1
Probability Equation Questions3 marks
A bag holds 9 counters, r of them red. Two are taken without replacement and P(both red) = 5/12. Work out r.
2
Histograms3 marks
On a histogram the bar for 10 < x <= 30 has a frequency density of 3.5. How many values are in that class?
3
Bounds3 marks
A rectangle is 10 cm by 25 cm, each correct to the nearest cm. Work out the upper bound of its area.
4
The Nth Term of a Quadratic Sequence3 marks
Work out the nth term of the quadratic sequence 1, 12, 27, 46, ...
5
Velocity Time Graphs2 marks
A train slows steadily from 40 m/s to rest in 10 seconds. Work out its deceleration.

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