Foundation Plus
11th March 1961
- 1Ratio2 marks
Red and blue stickers are in the ratio 5 : 8. There are 75 red stickers. How many stickers are there altogether?
- 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, 14 are in A only, 8 in B only, 4 in both and 4 in neither. Work out the probability a random one is in both.
- 4Capture Recapture3 marks
20 newts are marked and released. Later 20 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 March 1961, including the monthly compilation PDF.