Keystones — Capstone
Five GCSE retrieval questions · 22 March 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √833
Answer: 7√17 -
2. Algebra Completing the square
Complete the square: 4x² - 48x - 11
Answer: 4(x - 6)² - 155 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 14cm, b = 25cm, angle = 74°. Give your answer to 2 decimal places
Answer: 168.22cm² -
4. Ratio Combining two ratios
a:b is 2:9 and b:c is 2:9. Find a:b:c in its simplest form.
Answer: 4:18:81 -
5. Statistics Averages and range
Find the mean, median and range of: 47, 10, 99, 80, 25, 80, 97. Give your answer to 2 decimal places
Answer: Mean = 62.57, Median = 80, Range = 89