Keystones — Capstone
Five GCSE retrieval questions · 28 February 2014 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 2√54
Answer: 6√6 -
2. Algebra Completing the square
Complete the square: 2x² - 8x + 13
Answer: 2(x - 2)² + 5 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 26cm, b = 14cm, angle = 49°. Give your answer to 2 decimal places
Answer: 137.36cm² -
4. Ratio Combining two ratios
a:b is 7:9 and b:c is 8:7. Find a:b:c in its simplest form.
Answer: 56:72:63 -
5. Statistics Averages and range
Find the mean, median and range of: 38, 73, 32, 76, 65, 83, 80, 89
Answer: Mean = 67, Median = 74.5, Range = 57