Higher Plus
27th January 1959
- 1Direct and Inverse Proportion Depth3 marks
y is directly proportional to sqrt(x). When x = 9, y = 6. Work out y when x = 16.
- 2Finding the Area of Any Triangle3 marks
A triangle has sides of 8 cm and 16 cm and an area of 64.00 cm^2. Work out the acute angle between those two sides, to the nearest degree.
- 3Probability Equation Questions3 marks
A bag holds 12 counters, r of them red. Two are taken without replacement and P(both red) = 14/33. Work out r.
- 4Histograms3 marks
A histogram has four 10-wide classes from 0, with frequency densities 1, 2, 3, 0.5. Which class contains the median?
- 5Surds3 marks
Expand and simplify (6 + sqrt(2))(6 - sqrt(2)).
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