Keystones — Capstone
Five GCSE retrieval questions · 1 January 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 + 3.4x
Answer: (x + 1.7)² - 2.89 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 14cm, b = 18cm, angle = 68°
Answer: 116.8cm² -
4. Ratio Combining two ratios
a:b is 4:3 and b:c is 2:3. Find a:b:c.
Answer: 16:12:18 -
5. Statistics Averages and range
Find the mean, median and range of: 53, 36, 80, 35, 35, 77, 100, 22, 46
Answer: Mean = 53.8, Median = 46, Range = 78