Keystones — Capstone
Five GCSE retrieval questions · 29 June 2013 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √637
Answer: 7√13 -
2. Algebra Completing the square
Complete the square: 3x² - 24x - 8
Answer: 3(x - 4)² - 56 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 29cm, b = 20cm, angle = 73°. Give your answer to 2 decimal places
Answer: 277.33cm² -
4. Ratio Combining two ratios
a:b is 5:3 and b:c is 8:3. Find a:b:c in its simplest form.
Answer: 40:24:9 -
5. Statistics Averages and range
Find the mean, median and range of: 37, 89, 86, 97, 15, 39, 95, 15. Give your answer to 2 decimal places
Answer: Mean = 59.13, Median = 62.5, Range = 82