Keystones — Capstone
Five GCSE retrieval questions · 12 June 2010 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 4√32
Answer: 16√2 -
2. Algebra Completing the square
Complete the square: 4x² - 32x - 13
Answer: 4(x - 4)² - 77 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 15cm, b = 13cm, angle = 68°. Give your answer to 2 decimal places
Answer: 90.4cm² -
4. Ratio Combining two ratios
a:b is 1:8 and b:c is 5:6. Find a:b:c in its simplest form.
Answer: 5:40:48 -
5. Statistics Averages and range
Find the mean, median and range of: 47, 45, 83, 13, 100, 26, 50, 53. Give your answer to 2 decimal places
Answer: Mean = 52.13, Median = 48.5, Range = 87