Keystones — Capstone
Five GCSE retrieval questions · 7 July 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 5√275
Answer: 25√11 -
2. Algebra Completing the square
Complete the square: 4x² - 16x + 3
Answer: 4(x - 2)² - 13 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 12cm, b = 26cm, angle = 47°. Give your answer to 2 decimal places
Answer: 114.09cm² -
4. Ratio Combining two ratios
a:b is 8:5 and b:c is 8:5. Find a:b:c in its simplest form.
Answer: 64:40:25 -
5. Statistics Averages and range
Find the mean, median and range of: 38, 49, 41, 52, 27, 16, 36, 62, 82. Give your answer to 2 decimal places
Answer: Mean = 44.78, Median = 41, Range = 66