Keystones — Capstone
Five GCSE retrieval questions · 1 March 2012 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √176
Answer: 4√11 -
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 = 30cm, b = 27cm, angle = 43°. Give your answer to 2 decimal places
Answer: 276.21cm² -
4. Ratio Combining two ratios
a:b is 4:7 and b:c is 8:9. Find a:b:c in its simplest form.
Answer: 32:56:63 -
5. Statistics Averages and range
Find the mean, median and range of: 47, 99, 86, 70, 11, 23, 73, 67
Answer: Mean = 59.5, Median = 68.5, Range = 88