Keystones — Capstone
Five GCSE retrieval questions · 17 July 2013 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √600
Answer: 10√6 -
2. Algebra Completing the square
Complete the square: x² - x + 1
Answer: (x - 1⁄2)² + 3⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 27cm, b = 25cm, angle = 71°. Give your answer to 2 decimal places
Answer: 319.11cm² -
4. Ratio Combining two ratios
a:b is 1:9 and b:c is 5:7. Find a:b:c in its simplest form.
Answer: 5:45:63 -
5. Statistics Averages and range
Find the mean, median and range of: 75, 98, 22, 34, 82, 81, 46, 35. Give your answer to 2 decimal places
Answer: Mean = 59.13, Median = 60.5, Range = 76