Keystones — Capstone
Five GCSE retrieval questions · 17 August 2013 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 3√24
Answer: 6√6 -
2. Algebra Completing the square
Complete the square: 2x² + 16x - 2
Answer: 2(x + 4)² - 34 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 13cm, b = 28cm, angle = 51°. Give your answer to 2 decimal places
Answer: 141.44cm² -
4. Ratio Combining two ratios
a:b is 4:7 and b:c is 3:7. Find a:b:c in its simplest form.
Answer: 12:21:49 -
5. Statistics Averages and range
Find the mean, median and range of: 48, 46, 50, 75, 93, 63, 62, 64, 51. Give your answer to 2 decimal places
Answer: Mean = 61.33, Median = 62, Range = 47