Keystones — Capstone
Five GCSE retrieval questions · 3 November 2018 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √243
Answer: 9√3 -
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 = 13cm, angle = 63°
Answer: 168cm² -
4. Ratio Combining two ratios
a:b is 2:1 and b:c is 1:3. Find a:b:c.
Answer: 4:2:6 -
5. Statistics Averages and range
Find the mean, median and range of: 58, 72, 95, 52, 99, 34, 19, 35, 29
Answer: Mean = 54.8, Median = 52, Range = 80