Keystones — Capstone
Five GCSE retrieval questions · 4 August 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 4√44
Answer: 8√11 -
2. Algebra Completing the square
Complete the square: x² + x + 9
Answer: (x + 1⁄2)² + 35⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 19cm, b = 27cm, angle = 69°. Give your answer to 2 decimal places
Answer: 239.46cm² -
4. Ratio Combining two ratios
a:b is 1:8 and b:c is 6:5. Find a:b:c in its simplest form.
Answer: 3:24:20 -
5. Statistics Averages and range
Find the mean, median and range of: 22, 30, 87, 50, 28, 35, 17, 47
Answer: Mean = 39.5, Median = 32.5, Range = 70