Keystones — Capstone
Five GCSE retrieval questions · 16 January 2015 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 4√63
Answer: 12√7 -
2. Algebra Completing the square
Complete the square: 4x² - 16x + 2
Answer: 4(x - 2)² - 14 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 30cm, b = 22cm, angle = 44°. Give your answer to 2 decimal places
Answer: 229.24cm² -
4. Ratio Combining two ratios
a:b is 2:7 and b:c is 8:9. Find a:b:c in its simplest form.
Answer: 16:56:63 -
5. Statistics Averages and range
Find the mean, median and range of: 53, 77, 10, 92, 35, 64, 73, 51, 95. Give your answer to 2 decimal places
Answer: Mean = 61.11, Median = 64, Range = 85