Foundation Plus
16th October 1981
- 1Scale Drawings2 marks
A map has a scale of 1 : 25000. Two villages are 15 cm apart on the map. How far apart are they in real life, in km?
- 2Spheres and Cones3 marks
A sphere has radius 3 cm. Work out its volume, leaving your answer in terms of pi.
- 3Venn Diagrams3 marks
In a Venn diagram, 12 are in A only, 3 in B only, 7 in both and 1 in neither. Work out the probability a random one is in both.
- 4Capture Recapture3 marks
30 voles are marked and released. Later 40 are caught, of which 4 are marked. Estimate the population.
- 5Recurring Decimals to Fractions3 marks
Write the recurring decimal 0.111... as a fraction in its simplest form.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of October 1981, including the monthly compilation PDF.