Keystones — Capstone
Five GCSE retrieval questions · 18 January 2013 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √726
Answer: 11√6 -
2. Algebra Completing the square
Complete the square: x² + x + 12
Answer: (x + 1⁄2)² + 47⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 22cm, b = 21cm, angle = 47°. Give your answer to 2 decimal places
Answer: 168.94cm² -
4. Ratio Combining two ratios
a:b is 8:9 and b:c is 5:7. Find a:b:c in its simplest form.
Answer: 40:45:63 -
5. Statistics Averages and range
Find the mean, median and range of: 51, 87, 87, 45, 10, 26, 58, 65, 76. Give your answer to 2 decimal places
Answer: Mean = 56.11, Median = 58, Range = 77