Keystones — Capstone
Five GCSE retrieval questions · 16 May 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √304
Answer: 4√19 -
2. Algebra Completing the square
Complete the square: 3x² + 24x - 10
Answer: 3(x + 4)² - 58 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 27cm, b = 26cm, angle = 75°. Give your answer to 2 decimal places
Answer: 339.04cm² -
4. Ratio Combining two ratios
a:b is 5:7 and b:c is 6:7. Find a:b:c in its simplest form.
Answer: 30:42:49 -
5. Statistics Averages and range
Find the mean, median and range of: 30, 73, 10, 45, 95, 12, 29
Answer: Mean = 42, Median = 30, Range = 85