Higher
30th June 1990
- 1Expanding Triple Brackets3 marks
Expand and simplify (x - 2)(x - 1)(x - 1).
- 2Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^2. When x = 6, y = 324. Work out y when x = 2.
- 3Pythagoras2 marks
A right-angled triangle has a hypotenuse of 20 cm and one shorter side of 16 cm. Work out the other shorter side.
- 4Venn Diagrams3 marks
In a Venn diagram, 15 are in A only, 6 in B only, 9 in both and 9 in neither. Work out the probability a random one is in both.
- 5Box Plots2 marks
A box plot has minimum 4, lower quartile 13, median 19, upper quartile 22 and maximum 26. Work out the interquartile range.
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