Keystones — Capstone
Five GCSE retrieval questions · 27 February 2011 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √96
Answer: 4√6 -
2. Algebra Completing the square
Complete the square: x² + x + 6
Answer: (x + 1⁄2)² + 23⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 17cm, b = 18cm, angle = 44°. Give your answer to 2 decimal places
Answer: 106.28cm² -
4. Ratio Combining two ratios
a:b is 4:7 and b:c is 5:3. Find a:b:c in its simplest form.
Answer: 20:35:21 -
5. Statistics Averages and range
Find the mean, median and range of: 60, 92, 95, 12, 46, 58, 84, 93, 30. Give your answer to 2 decimal places
Answer: Mean = 63.33, Median = 60, Range = 83