Keystones — Capstone
Five GCSE retrieval questions · 26 November 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 2√275
Answer: 10√11 -
2. Algebra Completing the square
Complete the square: 3x² - 6x - 10
Answer: 3(x - 1)² - 13 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 30cm, b = 14cm, angle = 65°. Give your answer to 2 decimal places
Answer: 190.32cm² -
4. Ratio Combining two ratios
a:b is 5:6 and b:c is 7:5. Find a:b:c in its simplest form.
Answer: 35:42:30 -
5. Statistics Averages and range
Find the mean, median and range of: 86, 92, 88, 35, 52, 86, 14, 15, 94. Give your answer to 2 decimal places
Answer: Mean = 62.44, Median = 86, Range = 80