Higher Plus
24th September 1978
- 1Bounds3 marks
x = 93 and y = 75, each correct to the nearest whole number. Work out the upper bound of x - y.
- 2The Nth Term of a Quadratic Sequence3 marks
Work out the nth term of the quadratic sequence 13, 25, 43, 67, ...
- 3Direct and Inverse Proportion Depth3 marks
y is inversely proportional to x^2. When x = 5, y = 32. Work out y when x = 4.
- 4Finding the Area of Any Triangle3 marks
A triangle has sides of 16 cm and 12 cm and an area of 83.14 cm^2. Work out the acute angle between those two sides, to the nearest degree.
- 5Probability Equation Questions3 marks
A bag holds 8 counters, r of them red. Two are taken without replacement and P(both red) = 3/28. Work out r.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of September 1978, including the monthly compilation PDF.