Keystones — Capstone
Five GCSE retrieval questions · 2 June 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 3√63
Answer: 9√7 -
2. Algebra Completing the square
Complete the square: x² - x + 8
Answer: (x - 1⁄2)² + 31⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 15cm, b = 29cm, angle = 57°. Give your answer to 2 decimal places
Answer: 182.41cm² -
4. Ratio Combining two ratios
a:b is 9:2 and b:c is 9:5. Find a:b:c in its simplest form.
Answer: 81:18:10 -
5. Statistics Averages and range
Find the mean, median and range of: 98, 15, 94, 71, 77, 64, 73, 32
Answer: Mean = 65.5, Median = 72, Range = 83