Keystones — Capstone
Five GCSE retrieval questions · 13 February 2014 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √343
Answer: 7√7 -
2. Algebra Completing the square
Complete the square: 4x² - 32x + 8
Answer: 4(x - 4)² - 56 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 28cm, b = 21cm, angle = 63°. Give your answer to 2 decimal places
Answer: 261.96cm² -
4. Ratio Combining two ratios
a:b is 5:8 and b:c is 5:3. Find a:b:c in its simplest form.
Answer: 25:40:24 -
5. Statistics Averages and range
Find the mean, median and range of: 23, 68, 27, 55, 73, 77, 77, 68
Answer: Mean = 58.5, Median = 68, Range = 54