Keystones — Capstone
Five GCSE retrieval questions · 15 February 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √539
Answer: 7√11 -
2. Algebra Completing the square
Complete the square: x² + x + 10
Answer: (x + 1⁄2)² + 39⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 26cm, b = 28cm, angle = 60°. Give your answer to 2 decimal places
Answer: 315.23cm² -
4. Ratio Combining two ratios
a:b is 5:7 and b:c is 8:9. Find a:b:c in its simplest form.
Answer: 40:56:63 -
5. Statistics Averages and range
Find the mean, median and range of: 14, 98, 73, 40, 62, 98, 91, 15. Give your answer to 2 decimal places
Answer: Mean = 61.38, Median = 67.5, Range = 84