Higher
19th February 1983
- 1Expanding Triple Brackets3 marks
Expand and simplify (x - 3)(x + 5)(x - 4).
- 2Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^2. When x = 3, y = 27. Work out y when x = 9.
- 3Pythagoras2 marks
A right-angled triangle has a hypotenuse of 25 cm and one shorter side of 24 cm. Work out the other shorter side.
- 4Venn Diagrams3 marks
In a Venn diagram, 18 are in A only, 4 in B only, 2 in both and 5 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 26 and maximum 30. Work out the interquartile range.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of February 1983, including the monthly compilation PDF.