Keystones — Capstone
Five GCSE retrieval questions · 23 February 2017 · 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: 4x² + 16x + 11
Answer: 4(x + 2)² - 5 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 26cm, b = 14cm, angle = 62°. Give your answer to 2 decimal places
Answer: 160.7cm² -
4. Ratio Combining two ratios
a:b is 4:7 and b:c is 6:7. Find a:b:c in its simplest form.
Answer: 24:42:49 -
5. Statistics Averages and range
Find the mean, median and range of: 44, 10, 52, 90, 10, 70, 86. Give your answer to 2 decimal places
Answer: Mean = 51.71, Median = 52, Range = 80