Keystones — Capstone
Five GCSE retrieval questions · 31 May 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √726
Answer: 11√6 -
2. Algebra Completing the square
Complete the square: x² - 3x + 12
Answer: (x - 3⁄2)² + 39⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 25cm, b = 24cm, angle = 80°. Give your answer to 2 decimal places
Answer: 295.44cm² -
4. Ratio Combining two ratios
a:b is 8:9 and b:c is 7:4. Find a:b:c in its simplest form.
Answer: 56:63:36 -
5. Statistics Averages and range
Find the mean, median and range of: 35, 67, 56, 75, 47, 16, 29, 33
Answer: Mean = 44.75, Median = 41, Range = 59