Keystones — Capstone
Five GCSE retrieval questions · 26 October 2019 · 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 + 3.2x
Answer: (x + 1.6)² - 2.56 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 12cm, b = 14cm, angle = 62°
Answer: 74.2cm² -
4. Ratio Combining two ratios
a:b is 3:2 and b:c is 2:3. Find a:b:c.
Answer: 6:4:6 -
5. Statistics Averages and range
Find the mean, median and range of: 35, 36, 70, 36, 48, 27, 19
Answer: Mean = 38.7, Median = 36, Range = 51