Keystones — Capstone
Five GCSE retrieval questions · 25 June 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: 4x² + 24x + 7
Answer: 4(x + 3)² - 29 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 21cm, b = 13cm, angle = 46°. Give your answer to 2 decimal places
Answer: 98.19cm² -
4. Ratio Combining two ratios
a:b is 2:3 and b:c is 5:4. Find a:b:c in its simplest form.
Answer: 10:15:12 -
5. Statistics Averages and range
Find the mean, median and range of: 18, 59, 15, 37, 54, 43, 92, 26
Answer: Mean = 43, Median = 40, Range = 77