Keystones — Capstone
Five GCSE retrieval questions · 26 April 2012 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √147
Answer: 7√3 -
2. Algebra Completing the square
Complete the square: x² + x - 3
Answer: (x + 1⁄2)² - 13⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 24cm, b = 13cm, angle = 47°. Give your answer to 2 decimal places
Answer: 114.09cm² -
4. Ratio Combining two ratios
a:b is 4:7 and b:c is 2:5. Find a:b:c in its simplest form.
Answer: 8:14:35 -
5. Statistics Averages and range
Find the mean, median and range of: 16, 68, 10, 49, 35, 72, 80. Give your answer to 2 decimal places
Answer: Mean = 47.14, Median = 49, Range = 70