Higher Plus
1st January 1963
- 1Proof of the Circle Theorems2 marks
In a circle theorem proof, a step uses the fact that a tangent meets a radius at the point of contact. State the reason being quoted.
- 2Probability Equation Questions3 marks
A bag holds 12 counters, r of them red. Two are taken without replacement and P(both red) = 7/22. Work out r.
- 3Histograms2 marks
On a histogram, a 10-wide bar and a 40-wide bar have the same frequency density of 2. How many more values are in the wider class?
- 4Surds3 marks
Expand and simplify (8 + sqrt(2))(8 - sqrt(2)).
- 5Inverse and Composite Functions3 marks
f(x) = 5x - 6 and g(x) = 2x - 6. Work out fg(4).
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