Keystones — Capstone
Five GCSE retrieval questions · 27 August 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √147
Answer: 7√3 -
2. Algebra Completing the square
Complete the square: x² - x + 2
Answer: (x - 1⁄2)² + 7⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 29cm, b = 15cm, angle = 40°. Give your answer to 2 decimal places
Answer: 139.81cm² -
4. Ratio Combining two ratios
a:b is 5:2 and b:c is 5:2. Find a:b:c in its simplest form.
Answer: 25:10:4 -
5. Statistics Averages and range
Find the mean, median and range of: 97, 73, 64, 84, 53, 65, 59, 32, 84. Give your answer to 2 decimal places
Answer: Mean = 67.89, Median = 65, Range = 65