Higher Plus
21st February 1979
- 1Bounds3 marks
A rectangle is 21 cm by 11 cm, each correct to the nearest cm. Work out the upper bound of its area.
- 2Completing the Square3 marks
Work out the coordinates of the turning point of y = x^2 + 14x + 5.
- 3Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^3. When x = 2, y = 24. Work out y when x = 3.
- 4Finding the Area of Any Triangle3 marks
A triangle has sides of 12 cm and 10 cm and an area of 42.43 cm^2. Work out the acute angle between those two sides, to the nearest degree.
- 5Probability Equation Questions3 marks
A bag holds 12 counters, r of them red. Two are taken without replacement and P(both red) = 5/22. 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 February 1979, including the monthly compilation PDF.