Keystones — Capstone
Five GCSE retrieval questions · 28 March 2011 · 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 - 10
Answer: (x + 1⁄2)² - 41⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 19cm, b = 14cm, angle = 42°. Give your answer to 2 decimal places
Answer: 88.99cm² -
4. Ratio Combining two ratios
a:b is 3:4 and b:c is 3:8. Find a:b:c in its simplest form.
Answer: 9:12:32 -
5. Statistics Averages and range
Find the mean, median and range of: 79, 31, 72, 83, 59, 40, 28
Answer: Mean = 56, Median = 59, Range = 55