Keystones — Capstone
Five GCSE retrieval questions · 16 June 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √891
Answer: 9√11 -
2. Algebra Completing the square
Complete the square: x² - 7x - 10
Answer: (x - 7⁄2)² - 89⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 13cm, b = 22cm, angle = 41°. Give your answer to 2 decimal places
Answer: 93.82cm² -
4. Ratio Combining two ratios
a:b is 5:8 and b:c is 9:8. Find a:b:c in its simplest form.
Answer: 45:72:64 -
5. Statistics Averages and range
Find the mean, median and range of: 22, 39, 92, 82, 54, 48, 85, 90
Answer: Mean = 64, Median = 68, Range = 70