Keystones — Capstone
Five GCSE retrieval questions · 8 June 2014 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √112
Answer: 4√7 -
2. Algebra Completing the square
Complete the square: 3x² - 12x - 6
Answer: 3(x - 2)² - 18 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 16cm, b = 17cm, angle = 41°. Give your answer to 2 decimal places
Answer: 89.22cm² -
4. Ratio Combining two ratios
a:b is 7:8 and b:c is 3:8. Find a:b:c in its simplest form.
Answer: 21:24:64 -
5. Statistics Averages and range
Find the mean, median and range of: 46, 89, 58, 46, 11, 70, 89, 45
Answer: Mean = 56.75, Median = 52, Range = 78