Keystones — Capstone
Five GCSE retrieval questions · 30 September 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 + 5.2x
Answer: (x + 2.6)² - 6.76 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 18cm, b = 30cm, angle = 58°
Answer: 229cm² -
4. Ratio Combining two ratios
a:b is 3:4 and b:c is 4:5. Find a:b:c.
Answer: 3:4:5 -
5. Statistics Averages and range
Find the mean, median and range of: 24, 73, 31, 56, 91, 31, 74, 97
Answer: Mean = 59.6, Median = 73, Range = 73