Keystones — Capstone
Five GCSE retrieval questions · 6 May 2012 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √567
Answer: 9√7 -
2. Algebra Completing the square
Complete the square: 5x² - 60x + 6
Answer: 5(x - 6)² - 174 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 20cm, b = 16cm, angle = 47°. Give your answer to 2 decimal places
Answer: 117.02cm² -
4. Ratio Combining two ratios
a:b is 5:4 and b:c is 6:5. Find a:b:c in its simplest form.
Answer: 15:12:10 -
5. Statistics Averages and range
Find the mean, median and range of: 81, 32, 78, 27, 73, 97, 33. Give your answer to 2 decimal places
Answer: Mean = 60.14, Median = 73, Range = 70