Keystones — Capstone
Five GCSE retrieval questions · 19 June 2013 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √756
Answer: 6√21 -
2. Algebra Completing the square
Complete the square: 2x² - 12x + 4
Answer: 2(x - 3)² - 14 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 24cm, b = 18cm, angle = 68°. Give your answer to 2 decimal places
Answer: 200.27cm² -
4. Ratio Combining two ratios
a:b is 1:3 and b:c is 7:4. Find a:b:c in its simplest form.
Answer: 7:21:12 -
5. Statistics Averages and range
Find the mean, median and range of: 98, 43, 57, 33, 38, 32, 65, 48
Answer: Mean = 51.75, Median = 45.5, Range = 66