Keystones — Capstone
Five GCSE retrieval questions · 26 October 2015 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 3√44
Answer: 6√11 -
2. Algebra Completing the square
Complete the square: 2x² - 4x + 4
Answer: 2(x - 1)² + 2 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 30cm, b = 12cm, angle = 73°. Give your answer to 2 decimal places
Answer: 172.13cm² -
4. Ratio Combining two ratios
a:b is 9:8 and b:c is 7:5. Find a:b:c in its simplest form.
Answer: 63:56:40 -
5. Statistics Averages and range
Find the mean, median and range of: 66, 43, 45, 91, 83, 41, 58, 86. Give your answer to 2 decimal places
Answer: Mean = 64.13, Median = 62, Range = 50