Keystones — Capstone
Five GCSE retrieval questions · 26 November 2012 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 3√160
Answer: 12√10 -
2. Algebra Completing the square
Complete the square: 4x² - 40x + 13
Answer: 4(x - 5)² - 87 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 21cm, b = 27cm, angle = 60°. Give your answer to 2 decimal places
Answer: 245.52cm² -
4. Ratio Combining two ratios
a:b is 1:5 and b:c is 4:7. Find a:b:c in its simplest form.
Answer: 4:20:35 -
5. Statistics Averages and range
Find the mean, median and range of: 44, 74, 73, 65, 69, 30, 10, 74. Give your answer to 2 decimal places
Answer: Mean = 54.88, Median = 67, Range = 64