Higher
18th December 1980
- 1Bounds2 marks
A mass is 440 kg, correct to the nearest 10. Write down the lower bound.
- 2Quadratic Formula3 marks
Use the quadratic formula to solve 3x^2 + 12x + 3 = 0, to 2 decimal places.
- 3Repeated Percentage Change3 marks
A town's population is 22000 and grows by 6% each year. Work out the population after 3 years, to the nearest whole number.
- 4Similar Shapes (Area and Volume)3 marks
Two similar shapes have lengths in the ratio 1 : 5. The smaller has an area of 27 cm^2. Work out the area of the larger.
- 5Conditional Probability3 marks
9 students study Spanish and 5 of those also study Art. One Spanish student is picked at random. Work out the probability they study Art.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of December 1980, including the monthly compilation PDF.