Keystones — Capstone
Five GCSE retrieval questions · 19 May 2010 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √567
Answer: 9√7 -
2. Algebra Completing the square
Complete the square: x² - 3x + 5
Answer: (x - 3⁄2)² + 11⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 29cm, b = 28cm, angle = 43°. Give your answer to 2 decimal places
Answer: 276.89cm² -
4. Ratio Combining two ratios
a:b is 2:5 and b:c is 7:5. Find a:b:c in its simplest form.
Answer: 14:35:25 -
5. Statistics Averages and range
Find the mean, median and range of: 79, 45, 13, 94, 89, 89, 61, 27. Give your answer to 2 decimal places
Answer: Mean = 62.13, Median = 70, Range = 81