Keystones — Capstone
Five GCSE retrieval questions · 19 March 2013 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √600
Answer: 10√6 -
2. Algebra Completing the square
Complete the square: x² - 3x - 6
Answer: (x - 3⁄2)² - 33⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 26cm, b = 14cm, angle = 62°. Give your answer to 2 decimal places
Answer: 160.7cm² -
4. Ratio Combining two ratios
a:b is 1:6 and b:c is 4:9. Find a:b:c in its simplest form.
Answer: 2:12:27 -
5. Statistics Averages and range
Find the mean, median and range of: 25, 18, 92, 82, 29, 35, 89. Give your answer to 2 decimal places
Answer: Mean = 52.86, Median = 35, Range = 74