Keystones — Capstone
Five GCSE retrieval questions · 11 August 2014 · 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 + 7x + 10
Answer: (x + 7⁄2)² - 9⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 28cm, b = 30cm, angle = 51°. Give your answer to 2 decimal places
Answer: 326.4cm² -
4. Ratio Combining two ratios
a:b is 5:7 and b:c is 5:8. Find a:b:c in its simplest form.
Answer: 25:35:56 -
5. Statistics Averages and range
Find the mean, median and range of: 44, 14, 69, 99, 32, 95, 60, 76. Give your answer to 2 decimal places
Answer: Mean = 61.13, Median = 64.5, Range = 85