Keystones — Capstone
Five GCSE retrieval questions · 15 October 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: 4x² + 40x + 11
Answer: 4(x + 5)² - 89 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 26cm, b = 24cm, angle = 45°. Give your answer to 2 decimal places
Answer: 220.62cm² -
4. Ratio Combining two ratios
a:b is 8:5 and b:c is 7:1. Find a:b:c in its simplest form.
Answer: 56:35:5 -
5. Statistics Averages and range
Find the mean, median and range of: 29, 43, 66, 21, 89, 91, 92, 64. Give your answer to 2 decimal places
Answer: Mean = 61.88, Median = 65, Range = 71