Keystones — Capstone
Five GCSE retrieval questions · 3 April 2010 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √396
Answer: 6√11 -
2. Algebra Completing the square
Complete the square: 3x² - 24x + 10
Answer: 3(x - 4)² - 38 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 17cm, b = 13cm, angle = 44°. Give your answer to 2 decimal places
Answer: 76.76cm² -
4. Ratio Combining two ratios
a:b is 2:9 and b:c is 5:2. Find a:b:c in its simplest form.
Answer: 10:45:18 -
5. Statistics Averages and range
Find the mean, median and range of: 20, 71, 19, 74, 96, 55, 67, 70
Answer: Mean = 59, Median = 68.5, Range = 77