Keystones — Capstone
Five GCSE retrieval questions · 4 March 2019 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √75
Answer: 5√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 = 17cm, b = 25cm, angle = 62°
Answer: 187.6cm² -
4. Ratio Combining two ratios
a:b is 4:3 and b:c is 1:3. Find a:b:c.
Answer: 8:6:18 -
5. Statistics Averages and range
Find the mean, median and range of: 81, 11, 41, 10, 76, 34, 45
Answer: Mean = 42.6, Median = 41, Range = 71