Keystones — Capstone
Five GCSE retrieval questions · 8 April 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √147
Answer: 7√3 -
2. Algebra Completing the square
Complete the square: 5x² - 20x + 6
Answer: 5(x - 2)² - 14 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 26cm, b = 19cm, angle = 78°. Give your answer to 2 decimal places
Answer: 241.6cm² -
4. Ratio Combining two ratios
a:b is 6:7 and b:c is 5:4. Find a:b:c in its simplest form.
Answer: 30:35:28 -
5. Statistics Averages and range
Find the mean, median and range of: 62, 82, 62, 29, 80, 83, 84, 59, 11. Give your answer to 2 decimal places
Answer: Mean = 61.33, Median = 62, Range = 73