Keystones — Capstone
Five GCSE retrieval questions · 5 June 2012 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √704
Answer: 8√11 -
2. Algebra Completing the square
Complete the square: x² + x + 9
Answer: (x + 1⁄2)² + 35⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 12cm, b = 30cm, angle = 75°. Give your answer to 2 decimal places
Answer: 173.87cm² -
4. Ratio Combining two ratios
a:b is 7:6 and b:c is 8:7. Find a:b:c in its simplest form.
Answer: 28:24:21 -
5. Statistics Averages and range
Find the mean, median and range of: 56, 80, 31, 96, 92, 100, 89, 15, 44
Answer: Mean = 67, Median = 80, Range = 85