Keystones — Capstone
Five GCSE retrieval questions · 9 January 2011 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √147
Answer: 7√3 -
2. Algebra Completing the square
Complete the square: 4x² - 8x - 4
Answer: 4(x - 1)² - 8 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 18cm, b = 29cm, angle = 46°. Give your answer to 2 decimal places
Answer: 187.75cm² -
4. Ratio Combining two ratios
a:b is 7:6 and b:c is 7:1. Find a:b:c in its simplest form.
Answer: 49:42:6 -
5. Statistics Averages and range
Find the mean, median and range of: 40, 51, 10, 57, 96, 15, 15, 15, 61
Answer: Mean = 40, Median = 40, Range = 86