Keystones — Capstone
Five GCSE retrieval questions · 23 October 2012 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √704
Answer: 8√11 -
2. Algebra Completing the square
Complete the square: 3x² - 6x + 4
Answer: 3(x - 1)² + 1 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 19cm, b = 26cm, angle = 61°. Give your answer to 2 decimal places
Answer: 216.03cm² -
4. Ratio Combining two ratios
a:b is 9:2 and b:c is 7:9. Find a:b:c in its simplest form.
Answer: 63:14:18 -
5. Statistics Averages and range
Find the mean, median and range of: 46, 98, 41, 89, 14, 33, 35, 90, 59. Give your answer to 2 decimal places
Answer: Mean = 56.11, Median = 46, Range = 84