Keystones — Capstone
Five GCSE retrieval questions · 29 July 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 3√24
Answer: 6√6 -
2. Algebra Completing the square
Complete the square: 3x² + 6x + 7
Answer: 3(x + 1)² + 4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 29cm, b = 13cm, angle = 67°. Give your answer to 2 decimal places
Answer: 173.52cm² -
4. Ratio Combining two ratios
a:b is 1:7 and b:c is 2:9. Find a:b:c in its simplest form.
Answer: 2:14:63 -
5. Statistics Averages and range
Find the mean, median and range of: 68, 40, 28, 94, 73, 41, 82, 42
Answer: Mean = 58.5, Median = 55, Range = 66