Keystones — Capstone
Five GCSE retrieval questions · 14 July 2013 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 4√99
Answer: 12√11 -
2. Algebra Completing the square
Complete the square: 5x² + 60x + 6
Answer: 5(x + 6)² - 174 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 15cm, b = 29cm, angle = 66°. Give your answer to 2 decimal places
Answer: 198.7cm² -
4. Ratio Combining two ratios
a:b is 1:2 and b:c is 7:4. Find a:b:c in its simplest form.
Answer: 7:14:8 -
5. Statistics Averages and range
Find the mean, median and range of: 70, 31, 58, 10, 36, 38, 63. Give your answer to 2 decimal places
Answer: Mean = 43.71, Median = 38, Range = 60