Keystones — Capstone
Five GCSE retrieval questions · 1 March 2019 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √363
Answer: 11√3 -
2. Algebra Completing the square
Complete the square: x² + 2.6x
Answer: (x + 1.3)² - 1.69 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 13cm, b = 13cm, angle = 74°
Answer: 81.2cm² -
4. Ratio Combining two ratios
a:b is 2:1 and b:c is 3:5. Find a:b:c.
Answer: 12:6:10 -
5. Statistics Averages and range
Find the mean, median and range of: 40, 67, 33, 71, 90, 77, 11, 41, 95
Answer: Mean = 58.3, Median = 67, Range = 84