Keystones — Capstone
Five GCSE retrieval questions · 3 June 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √176
Answer: 4√11 -
2. Algebra Completing the square
Complete the square: 4x² - 48x - 4
Answer: 4(x - 6)² - 148 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 27cm, b = 27cm, angle = 49°. Give your answer to 2 decimal places
Answer: 275.09cm² -
4. Ratio Combining two ratios
a:b is 5:8 and b:c is 3:4. Find a:b:c in its simplest form.
Answer: 15:24:32 -
5. Statistics Averages and range
Find the mean, median and range of: 10, 79, 17, 54, 18, 70, 24, 59, 27. Give your answer to 2 decimal places
Answer: Mean = 39.78, Median = 27, Range = 69