Higher
19th November 1981
- 1Fractional and Negative Indices2 marks
Write 2^-3 as a fraction.
- 2Quadratic Formula3 marks
Work out the discriminant of 3x^2 + 6x + 11 = 0 and say how many real solutions it has.
- 3Repeated Percentage Change3 marks
A town's population is 6500 and grows by 8% each year. Work out the population after 4 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 24 cm^2. Work out the area of the larger.
- 5Conditional Probability3 marks
28 students study Spanish and 12 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 November 1981, including the monthly compilation PDF.