Keystones — Capstone
Five GCSE retrieval questions · 16 April 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 5√32
Answer: 20√2 -
2. Algebra Completing the square
Complete the square: 4x² + 32x + 12
Answer: 4(x + 4)² - 52 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 18cm, b = 27cm, angle = 58°. Give your answer to 2 decimal places
Answer: 206.08cm² -
4. Ratio Combining two ratios
a:b is 5:6 and b:c is 9:8. Find a:b:c in its simplest form.
Answer: 15:18:16 -
5. Statistics Averages and range
Find the mean, median and range of: 42, 34, 77, 81, 16, 88, 91. Give your answer to 2 decimal places
Answer: Mean = 61.29, Median = 77, Range = 75