Keystones — Capstone
Five GCSE retrieval questions · 30 January 2018 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √175
Answer: 5√7 -
2. Algebra Completing the square
Complete the square: x² - x + 12
Answer: (x - 1⁄2)² + 47⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 12cm, b = 29cm, angle = 64°. Give your answer to 2 decimal places
Answer: 156.39cm² -
4. Ratio Combining two ratios
a:b is 1:8 and b:c is 7:6. Find a:b:c in its simplest form.
Answer: 7:56:48 -
5. Statistics Averages and range
Find the mean, median and range of: 35, 60, 25, 82, 36, 64, 10. Give your answer to 2 decimal places
Answer: Mean = 44.57, Median = 36, Range = 72