Higher Plus
14th August 1960
- 1Proof of the Circle Theorems2 marks
In a circle theorem proof, a step uses the fact that the angle in a semicircle is being proved. State the reason being quoted.
- 2Probability Equation Questions3 marks
A bag holds 5 counters, r of them red. Two are taken without replacement and P(both red) = 3/10. Work out r.
- 3Histograms3 marks
A histogram has two bars: one 5 units wide with frequency density 1.2, one 5 units wide with density 3.5. How many values in total?
- 4Bounds3 marks
x = 185 and y = 149, each correct to the nearest whole number. Work out the upper bound of x - y.
- 5Rearranging Harder Formulae3 marks
Make x the subject of 6x + 7 = y(x + 7).
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