Keystones — Capstone
Five GCSE retrieval questions · 17 June 2014 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 5√176
Answer: 20√11 -
2. Algebra Completing the square
Complete the square: x² + 3x
Answer: (x + 3⁄2)² - 9⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 21cm, b = 26cm, angle = 52°. Give your answer to 2 decimal places
Answer: 215.13cm² -
4. Ratio Combining two ratios
a:b is 8:9 and b:c is 5:6. Find a:b:c in its simplest form.
Answer: 40:45:54 -
5. Statistics Averages and range
Find the mean, median and range of: 76, 36, 94, 83, 85, 27, 41, 25. Give your answer to 2 decimal places
Answer: Mean = 58.38, Median = 58.5, Range = 69