Keystones — Capstone
Five GCSE retrieval questions · 27 November 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 + 2
Answer: (x + 1⁄2)² + 7⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 23cm, b = 14cm, angle = 42°. Give your answer to 2 decimal places
Answer: 107.73cm² -
4. Ratio Combining two ratios
a:b is 8:9 and b:c is 6:7. Find a:b:c in its simplest form.
Answer: 16:18:21 -
5. Statistics Averages and range
Find the mean, median and range of: 45, 81, 86, 12, 32, 77, 79, 48
Answer: Mean = 57.5, Median = 62.5, Range = 74