Keystones — Capstone
Five GCSE retrieval questions · 4 May 2020 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √147
Answer: 7√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 = 29cm, b = 21cm, angle = 74°
Answer: 292.7cm² -
4. Ratio Combining two ratios
a:b is 2:1 and b:c is 3:4. Find a:b:c.
Answer: 12:6:8 -
5. Statistics Averages and range
Find the mean, median and range of: 40, 72, 25, 67, 14, 65, 35, 23
Answer: Mean = 42.6, Median = 40, Range = 58