Keystones — Capstone
Five GCSE retrieval questions · 9 July 2010 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 4√48
Answer: 16√3 -
2. Algebra Completing the square
Complete the square: 4x² - 24x + 2
Answer: 4(x - 3)² - 34 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 18cm, b = 18cm, angle = 67°. Give your answer to 2 decimal places
Answer: 149.12cm² -
4. Ratio Combining two ratios
a:b is 8:3 and b:c is 4:7. Find a:b:c in its simplest form.
Answer: 32:12:21 -
5. Statistics Averages and range
Find the mean, median and range of: 64, 82, 96, 26, 14, 35, 88, 68. Give your answer to 2 decimal places
Answer: Mean = 59.13, Median = 66, Range = 82