Keystones — Capstone
Five GCSE retrieval questions · 3 February 2018 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √176
Answer: 4√11 -
2. Algebra Completing the square
Complete the square: 4x² - 24x + 10
Answer: 4(x - 3)² - 26 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 24cm, b = 27cm, angle = 75°. Give your answer to 2 decimal places
Answer: 312.96cm² -
4. Ratio Combining two ratios
a:b is 1:5 and b:c is 9:7. Find a:b:c in its simplest form.
Answer: 9:45:35 -
5. Statistics Averages and range
Find the mean, median and range of: 23, 88, 61, 25, 54, 40, 39, 12
Answer: Mean = 42.75, Median = 39.5, Range = 76