Keystones — Capstone
Five GCSE retrieval questions · 12 March 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √294
Answer: 7√6 -
2. Algebra Completing the square
Complete the square: 2x² - 20x + 1
Answer: 2(x - 5)² - 49 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 29cm, b = 29cm, angle = 42°. Give your answer to 2 decimal places
Answer: 281.37cm² -
4. Ratio Combining two ratios
a:b is 8:5 and b:c is 9:2. Find a:b:c in its simplest form.
Answer: 72:45:10 -
5. Statistics Averages and range
Find the mean, median and range of: 98, 19, 13, 87, 32, 29, 44, 44
Answer: Mean = 45.75, Median = 38, Range = 85