Keystones — Capstone
Five GCSE retrieval questions · 26 May 2015 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √147
Answer: 7√3 -
2. Algebra Completing the square
Complete the square: x² + x + 6
Answer: (x + 1⁄2)² + 23⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 13cm, b = 18cm, angle = 40°. Give your answer to 2 decimal places
Answer: 75.21cm² -
4. Ratio Combining two ratios
a:b is 4:3 and b:c is 4:5. Find a:b:c in its simplest form.
Answer: 16:12:15 -
5. Statistics Averages and range
Find the mean, median and range of: 97, 84, 69, 40, 78, 97, 54. Give your answer to 2 decimal places
Answer: Mean = 74.14, Median = 78, Range = 57