Keystones — Capstone
Five GCSE retrieval questions · 12 October 2014 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √294
Answer: 7√6 -
2. Algebra Completing the square
Complete the square: 4x² + 24x - 8
Answer: 4(x + 3)² - 44 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 26cm, b = 30cm, angle = 53°. Give your answer to 2 decimal places
Answer: 311.47cm² -
4. Ratio Combining two ratios
a:b is 1:9 and b:c is 7:8. Find a:b:c in its simplest form.
Answer: 7:63:72 -
5. Statistics Averages and range
Find the mean, median and range of: 49, 54, 12, 50, 63, 23, 44, 25
Answer: Mean = 40, Median = 46.5, Range = 51