Keystones — Capstone
Five GCSE retrieval questions · 20 April 2011 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √343
Answer: 7√7 -
2. Algebra Completing the square
Complete the square: 4x² + 8x
Answer: 4(x + 1)² - 4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 24cm, b = 28cm, angle = 65°. Give your answer to 2 decimal places
Answer: 304.52cm² -
4. Ratio Combining two ratios
a:b is 3:5 and b:c is 6:7. Find a:b:c in its simplest form.
Answer: 18:30:35 -
5. Statistics Averages and range
Find the mean, median and range of: 36, 39, 17, 81, 68, 33, 39, 31
Answer: Mean = 43, Median = 37.5, Range = 64