Keystones — Capstone
Five GCSE retrieval questions · 15 April 2012 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √304
Answer: 4√19 -
2. Algebra Completing the square
Complete the square: x² - x - 7
Answer: (x - 1⁄2)² - 29⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 22cm, b = 22cm, angle = 79°. Give your answer to 2 decimal places
Answer: 237.55cm² -
4. Ratio Combining two ratios
a:b is 2:5 and b:c is 3:7. Find a:b:c in its simplest form.
Answer: 6:15:35 -
5. Statistics Averages and range
Find the mean, median and range of: 30, 85, 62, 96, 33, 43, 78, 10. Give your answer to 2 decimal places
Answer: Mean = 54.63, Median = 52.5, Range = 86