Keystones — Capstone
Five GCSE retrieval questions · 16 February 2018 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 3√28
Answer: 6√7 -
2. Algebra Completing the square
Complete the square: 4x² + 40x + 8
Answer: 4(x + 5)² - 92 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 26cm, b = 16cm, angle = 74°. Give your answer to 2 decimal places
Answer: 199.94cm² -
4. Ratio Combining two ratios
a:b is 2:3 and b:c is 2:3. Find a:b:c in its simplest form.
Answer: 4:6:9 -
5. Statistics Averages and range
Find the mean, median and range of: 70, 55, 68, 41, 77, 53, 89, 77, 37
Answer: Mean = 63, Median = 68, Range = 52