Keystones — Capstone
Five GCSE retrieval questions · 17 November 2014 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √343
Answer: 7√7 -
2. Algebra Completing the square
Complete the square: 5x² - 40x - 12
Answer: 5(x - 4)² - 92 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 27cm, b = 14cm, angle = 63°. Give your answer to 2 decimal places
Answer: 168.4cm² -
4. Ratio Combining two ratios
a:b is 5:9 and b:c is 5:4. Find a:b:c in its simplest form.
Answer: 25:45:36 -
5. Statistics Averages and range
Find the mean, median and range of: 17, 19, 33, 29, 15, 74, 17, 44
Answer: Mean = 31, Median = 24, Range = 59