Keystones — Capstone
Five GCSE retrieval questions · 14 May 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √275
Answer: 5√11 -
2. Algebra Completing the square
Complete the square: x² - 11x + 1
Answer: (x - 11⁄2)² - 117⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 16cm, b = 29cm, angle = 77°. Give your answer to 2 decimal places
Answer: 226.05cm² -
4. Ratio Combining two ratios
a:b is 8:5 and b:c is 7:6. Find a:b:c in its simplest form.
Answer: 56:35:30 -
5. Statistics Averages and range
Find the mean, median and range of: 35, 64, 31, 51, 74, 39, 95, 17
Answer: Mean = 50.75, Median = 45, Range = 78