Daily Practice
Higher
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20th March 1972
- 1Circle Theorems2 marks
A, B and C are points on a circle with centre O. Angle AOC is 152°. Work out angle ABC, where B is on the major arc.
- 2Venn Diagrams3 marks
In a Venn diagram, 9 are in A only, 14 in B only, 3 in both and 9 in neither. Work out the probability a random one is in both.
- 3Cumulative Frequency2 marks
A cumulative frequency graph is drawn for 72 values. What cumulative frequency do you read across from to estimate the lower quartile?
- 4Fractional and Negative Indices2 marks
Write 9^-3 as a fraction.
- 5Expanding and Factorising Quadratics2 marks
Factorise x^2 - 9.
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