Keystones — Capstone
Five GCSE retrieval questions · 1 June 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √288
Answer: 12√2 -
2. Algebra Completing the square
Complete the square: x² - 9x - 3
Answer: (x - 9⁄2)² - 93⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 26cm, b = 26cm, angle = 63°. Give your answer to 2 decimal places
Answer: 301.16cm² -
4. Ratio Combining two ratios
a:b is 7:5 and b:c is 7:3. Find a:b:c in its simplest form.
Answer: 49:35:15 -
5. Statistics Averages and range
Find the mean, median and range of: 56, 47, 29, 74, 47, 76, 37. Give your answer to 2 decimal places
Answer: Mean = 52.29, Median = 47, Range = 47