Foundation Plus
9th April 1983
- 1Ratio2 marks
Red and blue marbles are in the ratio 3 : 4. There are 18 red marbles. How many marbles are there altogether?
- 2Spheres and Cones3 marks
A sphere has radius 6 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, 6 in both and 6 in neither. Work out the probability a random one is in both.
- 4Frequency Trees3 marks
160 people were surveyed. 50 were adults, of whom 20 said yes. 25 of the children said yes. How many said yes altogether?
- 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 April 1983, including the monthly compilation PDF.