Keystones — Capstone
Five GCSE retrieval questions · 18 August 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √567
Answer: 9√7 -
2. Algebra Completing the square
Complete the square: x² - x - 2
Answer: (x - 1⁄2)² - 9⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 22cm, b = 16cm, angle = 50°. Give your answer to 2 decimal places
Answer: 134.82cm² -
4. Ratio Combining two ratios
a:b is 9:8 and b:c is 3:7. Find a:b:c in its simplest form.
Answer: 27:24:56 -
5. Statistics Averages and range
Find the mean, median and range of: 63, 48, 89, 71, 44, 33, 99. Give your answer to 2 decimal places
Answer: Mean = 63.86, Median = 63, Range = 66