Keystones — Capstone
Five GCSE retrieval questions · 25 June 2012 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √304
Answer: 4√19 -
2. Algebra Completing the square
Complete the square: 4x² - 24x - 12
Answer: 4(x - 3)² - 48 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 29cm, b = 14cm, angle = 41°. Give your answer to 2 decimal places
Answer: 133.18cm² -
4. Ratio Combining two ratios
a:b is 1:8 and b:c is 7:3. Find a:b:c in its simplest form.
Answer: 7:56:24 -
5. Statistics Averages and range
Find the mean, median and range of: 15, 93, 25, 46, 30, 46, 79, 61, 14. Give your answer to 2 decimal places
Answer: Mean = 45.44, Median = 46, Range = 79