Keystones — Capstone
Five GCSE retrieval questions · 20 April 2013 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √294
Answer: 7√6 -
2. Algebra Completing the square
Complete the square: x² - 9x - 7
Answer: (x - 9⁄2)² - 109⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 14cm, b = 26cm, angle = 61°. Give your answer to 2 decimal places
Answer: 159.18cm² -
4. Ratio Combining two ratios
a:b is 4:5 and b:c is 7:9. Find a:b:c in its simplest form.
Answer: 28:35:45 -
5. Statistics Averages and range
Find the mean, median and range of: 73, 81, 96, 70, 23, 27, 71, 91, 14. Give your answer to 2 decimal places
Answer: Mean = 60.67, Median = 71, Range = 82