Higher Plus
27th August 1978
- 1Direct and Inverse Proportion Depth3 marks
y is directly proportional to sqrt(x). When x = 16, y = 16. Work out y when x = 81.
- 2The Cosine Rule3 marks
A triangle has sides 11 cm, 6 cm and 10 cm. Work out the angle opposite the 11 cm side, to 1 decimal place.
- 3Probability Equation Questions3 marks
A bag holds 3 red and n blue counters. The probability of taking a red is 1/3. Work out n.
- 4Histograms3 marks
A histogram has four 10-wide classes from 0, with frequency densities 1, 3, 2, 0.5. Which class contains the median?
- 5Bounds3 marks
x = 162 and y = 68, each correct to the nearest whole number. Work out the upper bound of x - y.
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