Daily Practice - Higher
28th September 1991
- 1Recurring Decimals to Fractions3 marks
Write the recurring decimal 0.777... as a fraction in its simplest form.
- 2Quadratic Formula3 marks
Work out the discriminant of 4x^2 - 5x + 2 = 0 and say how many real solutions it has.
- 3Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^2. When x = 2, y = 16. Work out y when x = 9.
- 4Similar Shapes (Area and Volume)3 marks
Two similar shapes have lengths in the ratio 1 : 5. The smaller has an area of 5 cm^2. Work out the area of the larger.
- 5Conditional Probability3 marks
10 students study Spanish and 4 of those also study Art. One Spanish student is picked at random. Work out the probability they study Art.
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