Keystones — Capstone
Five GCSE retrieval questions · 16 August 2014 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 2√44
Answer: 4√11 -
2. Algebra Completing the square
Complete the square: 2x² + 20x + 13
Answer: 2(x + 5)² - 37 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 20cm, b = 25cm, angle = 76°. Give your answer to 2 decimal places
Answer: 242.57cm² -
4. Ratio Combining two ratios
a:b is 6:7 and b:c is 8:5. Find a:b:c in its simplest form.
Answer: 48:56:35 -
5. Statistics Averages and range
Find the mean, median and range of: 52, 46, 58, 33, 13, 63, 93. Give your answer to 2 decimal places
Answer: Mean = 51.14, Median = 52, Range = 80