Daily Practice

Higher Plus

10th August 1977

5 questions · 15 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) = 1/5. Work out r.
2
Histograms3 marks
On a histogram the bar for 30 < x <= 40 has a frequency density of 2.4. How many values are in that class?
3
Bounds3 marks
A rectangle is 18 cm by 13 cm, each correct to the nearest cm. Work out the upper bound of its area.
4
Rearranging Harder Formulae3 marks
Make x the subject of 4x + 3 = y(x + 3).
5
Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^3. When x = 2, y = 16. Work out y when x = 4.

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