Keystones — Capstone
Five GCSE retrieval questions · 31 January 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √192
Answer: 8√3 -
2. Algebra Completing the square
Complete the square: x² - x + 11
Answer: (x - 1⁄2)² + 43⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 17cm, b = 28cm, angle = 52°. Give your answer to 2 decimal places
Answer: 187.55cm² -
4. Ratio Combining two ratios
a:b is 4:7 and b:c is 2:9. Find a:b:c in its simplest form.
Answer: 8:14:63 -
5. Statistics Averages and range
Find the mean, median and range of: 55, 68, 69, 32, 86, 60, 59, 55
Answer: Mean = 60.5, Median = 59.5, Range = 54