Keystones — Capstone
Five GCSE retrieval questions · 18 January 2020 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √162
Answer: 9√2 -
2. Algebra Completing the square
Complete the square: x² + 2x
Answer: (x + 1)² - 1 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 29cm, b = 25cm, angle = 64°
Answer: 325.8cm² -
4. Ratio Combining two ratios
a:b is 1:2 and b:c is 3:5. Find a:b:c.
Answer: 6:12:20 -
5. Statistics Averages and range
Find the mean, median and range of: 41, 51, 92, 14, 71, 56, 93, 50
Answer: Mean = 58.5, Median = 56, Range = 79