Keystones — Capstone
Five GCSE retrieval questions · 12 February 2013 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √363
Answer: 11√3 -
2. Algebra Completing the square
Complete the square: 2x² - 8x
Answer: 2(x - 2)² - 8 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 16cm, b = 22cm, angle = 59°. Give your answer to 2 decimal places
Answer: 150.86cm² -
4. Ratio Combining two ratios
a:b is 7:2 and b:c is 9:2. Find a:b:c in its simplest form.
Answer: 63:18:4 -
5. Statistics Averages and range
Find the mean, median and range of: 85, 71, 46, 14, 84, 70, 36
Answer: Mean = 58, Median = 70, Range = 71