Higher
17th August 1990
- 1Expanding Triple Brackets3 marks
Expand and simplify (x + 2)(x - 5)(x - 1).
- 2Direct and Inverse Proportion3 marks
y is directly proportional to x. When x = 2, y = 12. Work out y when x = 13.
- 3Pythagoras2 marks
A right-angled triangle has a hypotenuse of 41 cm and one shorter side of 9 cm. Work out the other shorter side.
- 4Venn Diagrams3 marks
In a Venn diagram, 3 are in A only, 9 in B only, 11 in both and 1 in neither. Work out the probability a random one is in both.
- 5Capture Recapture2 marks
A capture-recapture estimate is made of the ladybird population of a garden. State one assumption the method relies on.
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