Higher
8th October 1987
- 1Expanding and Factorising Quadratics2 marks
Factorise x^2 - 49.
- 2Repeated Percentage Change3 marks
A town's population is 34500 and grows by 8% each year. Work out the population after 2 years, to the nearest whole number.
- 3Circle Theorems2 marks
A, B and C are points on a circle with centre O. Angle AOC is 56°. Work out angle ABC, where B is on the major arc.
- 4Venn Diagrams3 marks
In a Venn diagram, 12 are in A only, 15 in B only, 11 in both and 2 in neither. Work out the probability a random one is in both.
- 5Histograms2 marks
A histogram class is 4 units wide and contains 12 values. Work out the frequency density.
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