Keystones — Capstone
Five GCSE retrieval questions · 15 September 2014 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √504
Answer: 6√14 -
2. Algebra Completing the square
Complete the square: x² + x + 8
Answer: (x + 1⁄2)² + 31⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 26cm, b = 26cm, angle = 68°. Give your answer to 2 decimal places
Answer: 313.39cm² -
4. Ratio Combining two ratios
a:b is 5:8 and b:c is 6:1. Find a:b:c in its simplest form.
Answer: 15:24:4 -
5. Statistics Averages and range
Find the mean, median and range of: 63, 10, 84, 92, 45, 38, 47, 21, 80. Give your answer to 2 decimal places
Answer: Mean = 53.33, Median = 47, Range = 82