Keystones — Capstone
Five GCSE retrieval questions · 3 January 2018 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √833
Answer: 7√17 -
2. Algebra Completing the square
Complete the square: x² - x + 2
Answer: (x - 1⁄2)² + 7⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 29cm, b = 22cm, angle = 60°. Give your answer to 2 decimal places
Answer: 276.26cm² -
4. Ratio Combining two ratios
a:b is 7:4 and b:c is 5:6. Find a:b:c in its simplest form.
Answer: 35:20:24 -
5. Statistics Averages and range
Find the mean, median and range of: 99, 20, 68, 68, 58, 43, 71, 33, 57. Give your answer to 2 decimal places
Answer: Mean = 57.44, Median = 58, Range = 79