Daily Practice
Higher Plus
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31st July 1956
- 1Probability Equation Questions3 marks
A bag holds 12 counters, r of them red. Two are taken without replacement and P(both red) = 6/11. Work out r.
- 2Histograms3 marks
On a histogram the bar for 40 < x <= 45 has a frequency density of 3.5. How many values are in that class?
- 3Surds3 marks
Expand and simplify (8 + sqrt(6))(8 - sqrt(6)).
- 4Quadratic Inequalities3 marks
Solve x^2 - 8x + 12 < 0.
- 5Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^3. When x = 4, y = 192. Work out y when x = 5.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of July 1956, including the monthly compilation PDF.