Keystones — Capstone
Five GCSE retrieval questions · 8 June 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √343
Answer: 7√7 -
2. Algebra Completing the square
Complete the square: 3x² - 12x + 4
Answer: 3(x - 2)² - 8 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 24cm, b = 20cm, angle = 46°. Give your answer to 2 decimal places
Answer: 172.64cm² -
4. Ratio Combining two ratios
a:b is 9:2 and b:c is 9:2. Find a:b:c in its simplest form.
Answer: 81:18:4 -
5. Statistics Averages and range
Find the mean, median and range of: 98, 82, 19, 100, 59, 61, 64, 11
Answer: Mean = 61.75, Median = 62.5, Range = 89