Keystones — Capstone
Five GCSE retrieval questions · 21 January 2018 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 3√12
Answer: 6√3 -
2. Algebra Completing the square
Complete the square: x² - 3x + 11
Answer: (x - 3⁄2)² + 35⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 14cm, b = 29cm, angle = 41°. Give your answer to 2 decimal places
Answer: 133.18cm² -
4. Ratio Combining two ratios
a:b is 2:5 and b:c is 3:8. Find a:b:c in its simplest form.
Answer: 6:15:40 -
5. Statistics Averages and range
Find the mean, median and range of: 47, 69, 62, 32, 15, 95, 17. Give your answer to 2 decimal places
Answer: Mean = 48.14, Median = 47, Range = 80