Keystones — Capstone
Five GCSE retrieval questions · 25 July 2022 · 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 + 5.8x
Answer: (x + 2.9)² - 8.41 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 15cm, b = 28cm, angle = 73°
Answer: 200.8cm² -
4. Ratio Combining two ratios
a:b is 3:4 and b:c is 1:2. Find a:b:c.
Answer: 9:12:24 -
5. Statistics Averages and range
Find the mean, median and range of: 60, 73, 46, 80, 50, 73, 72
Answer: Mean = 64.9, Median = 72, Range = 34