Keystones — Capstone
Five GCSE retrieval questions · 2 May 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √704
Answer: 8√11 -
2. Algebra Completing the square
Complete the square: x² - x + 9
Answer: (x - 1⁄2)² + 35⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 17cm, b = 24cm, angle = 67°. Give your answer to 2 decimal places
Answer: 187.78cm² -
4. Ratio Combining two ratios
a:b is 3:4 and b:c is 7:9. Find a:b:c in its simplest form.
Answer: 21:28:36 -
5. Statistics Averages and range
Find the mean, median and range of: 14, 59, 54, 78, 39, 68, 59, 27, 69. Give your answer to 2 decimal places
Answer: Mean = 51.89, Median = 59, Range = 64