Keystones — Capstone
Five GCSE retrieval questions · 18 February 2013 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √176
Answer: 4√11 -
2. Algebra Completing the square
Complete the square: 4x² - 32x - 1
Answer: 4(x - 4)² - 65 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 28cm, b = 12cm, angle = 66°. Give your answer to 2 decimal places
Answer: 153.48cm² -
4. Ratio Combining two ratios
a:b is 3:7 and b:c is 2:7. Find a:b:c in its simplest form.
Answer: 6:14:49 -
5. Statistics Averages and range
Find the mean, median and range of: 33, 26, 62, 19, 71, 27, 31. Give your answer to 2 decimal places
Answer: Mean = 38.43, Median = 31, Range = 52