Keystones — Capstone
Five GCSE retrieval questions · 8 July 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √325
Answer: 5√13 -
2. Algebra Completing the square
Complete the square: x² - x - 5
Answer: (x - 1⁄2)² - 21⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 24cm, b = 17cm, angle = 76°. Give your answer to 2 decimal places
Answer: 197.94cm² -
4. Ratio Combining two ratios
a:b is 2:3 and b:c is 7:8. Find a:b:c in its simplest form.
Answer: 14:21:24 -
5. Statistics Averages and range
Find the mean, median and range of: 33, 68, 60, 68, 67, 87, 98, 81, 24. Give your answer to 2 decimal places
Answer: Mean = 65.11, Median = 68, Range = 74