Daily Practice

Higher Plus

27th February 1974

5 questions · 13 marks · Grades 8-9 · 51 question types in this band

1
Probability Equation Questions3 marks
A bag holds 10 counters, r of them red. Two are taken without replacement and P(both red) = 2/9. Work out r.
2
Histograms3 marks
On a histogram the bar for 0 < x <= 20 has a frequency density of 2.4. How many values are in that class?
3
Bounds3 marks
A rectangle is 7 cm by 13 cm, each correct to the nearest cm. Work out the upper bound of its area.
4
The Nth Term of a Quadratic Sequence2 marks
A quadratic sequence starts 13, 23, 39, 61. Work out the second difference, and the coefficient of n^2.
5
Velocity Time Graphs2 marks
A train slows steadily from 29 m/s to rest in 4 seconds. Work out its deceleration.

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