Keystones — Capstone
Five GCSE retrieval questions · 19 July 2019 · 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 + 3.4x
Answer: (x + 1.7)² - 2.89 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 19cm, b = 29cm, angle = 42°
Answer: 184.3cm² -
4. Ratio Combining two ratios
a:b is 4:3 and b:c is 2:5. Find a:b:c.
Answer: 8:6:15 -
5. Statistics Averages and range
Find the mean, median and range of: 55, 79, 43, 67, 24, 54, 74
Answer: Mean = 56.6, Median = 55, Range = 55