Keystones — Capstone
Five GCSE retrieval questions · 25 August 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √242
Answer: 11√2 -
2. Algebra Completing the square
Complete the square: 4x² - 24x - 3
Answer: 4(x - 3)² - 39 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 27cm, b = 13cm, angle = 65°. Give your answer to 2 decimal places
Answer: 159.06cm² -
4. Ratio Combining two ratios
a:b is 1:9 and b:c is 7:9. Find a:b:c in its simplest form.
Answer: 7:63:81 -
5. Statistics Averages and range
Find the mean, median and range of: 36, 41, 77, 12, 49, 90, 78, 69
Answer: Mean = 56.5, Median = 59, Range = 78