Keystones — Capstone
Five GCSE retrieval questions · 28 September 2013 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √294
Answer: 7√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 = 15cm, b = 28cm, angle = 47°. Give your answer to 2 decimal places
Answer: 153.58cm² -
4. Ratio Combining two ratios
a:b is 7:4 and b:c is 5:9. Find a:b:c in its simplest form.
Answer: 35:20:36 -
5. Statistics Averages and range
Find the mean, median and range of: 51, 40, 22, 83, 18, 57, 73. Give your answer to 2 decimal places
Answer: Mean = 49.14, Median = 51, Range = 65