Keystones — Capstone
Five GCSE retrieval questions · 18 June 2010 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 3√75
Answer: 15√3 -
2. Algebra Completing the square
Complete the square: x² - 11x + 4
Answer: (x - 11⁄2)² - 105⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 26cm, b = 26cm, angle = 62°. Give your answer to 2 decimal places
Answer: 298.44cm² -
4. Ratio Combining two ratios
a:b is 7:9 and b:c is 6:1. Find a:b:c in its simplest form.
Answer: 14:18:3 -
5. Statistics Averages and range
Find the mean, median and range of: 75, 48, 11, 32, 77, 98, 94, 85
Answer: Mean = 65, Median = 76, Range = 87