Keystones — Capstone
Five GCSE retrieval questions · 29 April 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √343
Answer: 7√7 -
2. Algebra Completing the square
Complete the square: x² + x + 8
Answer: (x + 1⁄2)² + 31⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 27cm, b = 12cm, angle = 71°. Give your answer to 2 decimal places
Answer: 153.17cm² -
4. Ratio Combining two ratios
a:b is 9:2 and b:c is 3:5. Find a:b:c in its simplest form.
Answer: 27:6:10 -
5. Statistics Averages and range
Find the mean, median and range of: 19, 14, 93, 77, 98, 69, 53, 62, 32. Give your answer to 2 decimal places
Answer: Mean = 57.44, Median = 62, Range = 84