Keystones — Capstone
Five GCSE retrieval questions · 11 July 2010 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √363
Answer: 11√3 -
2. Algebra Completing the square
Complete the square: 2x² + 16x + 11
Answer: 2(x + 4)² - 21 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 16cm, b = 29cm, angle = 44°. Give your answer to 2 decimal places
Answer: 161.16cm² -
4. Ratio Combining two ratios
a:b is 2:3 and b:c is 8:1. Find a:b:c in its simplest form.
Answer: 16:24:3 -
5. Statistics Averages and range
Find the mean, median and range of: 25, 16, 59, 17, 36, 90, 32, 92. Give your answer to 2 decimal places
Answer: Mean = 45.88, Median = 34, Range = 76