Keystones — Capstone
Five GCSE retrieval questions · 5 June 2019 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √288
Answer: 12√2 -
2. Algebra Completing the square
Complete the square: x² + 5.2x
Answer: (x + 2.6)² - 6.76 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 24cm, b = 26cm, angle = 65°
Answer: 282.8cm² -
4. Ratio Combining two ratios
a:b is 1:2 and b:c is 4:3. Find a:b:c.
Answer: 2:4:3 -
5. Statistics Averages and range
Find the mean, median and range of: 83, 15, 37, 69, 36, 30, 59, 48, 81
Answer: Mean = 50.9, Median = 48, Range = 68