Higher
30th July 1979
- 1Circle Theorems2 marks
A, B and C are points on a circle with centre O. Angle AOC is 42°. Work out angle ABC, where B is on the major arc.
- 2Venn Diagrams3 marks
In a Venn diagram, 15 are in A only, 3 in B only, 5 in both and 10 in neither. Work out the probability a random one is in both.
- 3Cumulative Frequency2 marks
A cumulative frequency graph is drawn for 104 values. What cumulative frequency do you read across from to estimate the lower quartile?
- 4Surds2 marks
Write sqrt(98) in the form a sqrt(b), where b is as small as possible.
- 5Expanding and Factorising Quadratics2 marks
Factorise x^2 - 100.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of July 1979, including the monthly compilation PDF.