Keystones — Capstone
Five GCSE retrieval questions · 6 March 2013 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √847
Answer: 11√7 -
2. Algebra Completing the square
Complete the square: x² - 11x + 6
Answer: (x - 11⁄2)² - 97⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 25cm, b = 14cm, angle = 66°. Give your answer to 2 decimal places
Answer: 159.87cm² -
4. Ratio Combining two ratios
a:b is 5:7 and b:c is 3:2. Find a:b:c in its simplest form.
Answer: 15:21:14 -
5. Statistics Averages and range
Find the mean, median and range of: 41, 34, 96, 78, 17, 13, 15, 90
Answer: Mean = 48, Median = 37.5, Range = 83