Keystones — Capstone
Five GCSE retrieval questions · 4 May 2011 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √352
Answer: 4√22 -
2. Algebra Completing the square
Complete the square: 2x² - 4x + 12
Answer: 2(x - 1)² + 10 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 18cm, b = 14cm, angle = 52°. Give your answer to 2 decimal places
Answer: 99.29cm² -
4. Ratio Combining two ratios
a:b is 1:2 and b:c is 7:3. Find a:b:c in its simplest form.
Answer: 7:14:6 -
5. Statistics Averages and range
Find the mean, median and range of: 63, 34, 58, 46, 87, 100, 87. Give your answer to 2 decimal places
Answer: Mean = 67.86, Median = 63, Range = 66