Keystones — Capstone
Five GCSE retrieval questions · 25 January 2013 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √735
Answer: 7√15 -
2. Algebra Completing the square
Complete the square: x² + x - 10
Answer: (x + 1⁄2)² - 41⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 27cm, b = 24cm, angle = 44°. Give your answer to 2 decimal places
Answer: 225.07cm² -
4. Ratio Combining two ratios
a:b is 2:5 and b:c is 7:6. Find a:b:c in its simplest form.
Answer: 14:35:30 -
5. Statistics Averages and range
Find the mean, median and range of: 38, 22, 48, 88, 98, 73, 69, 52, 52
Answer: Mean = 60, Median = 52, Range = 76