Higher Plus
18th December 1959
- 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 10 counters, r of them red. Two are taken without replacement and P(both red) = 28/45. Work out r.
- 3Histograms3 marks
A histogram has two bars: one 10 units wide with frequency density 1.2, one 20 units wide with density 0.8. How many values in total?
- 4Surds3 marks
Rationalise the denominator of 35/sqrt(7), giving your answer in its simplest form.
- 5The Nth Term of a Quadratic Sequence2 marks
A quadratic sequence starts 14, 26, 44, 68. Work out the second difference, and the coefficient of n^2.
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