Keystones — Capstone
Five GCSE retrieval questions · 26 September 2014 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √704
Answer: 8√11 -
2. Algebra Completing the square
Complete the square: 3x² - 24x - 15
Answer: 3(x - 4)² - 63 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 28cm, b = 26cm, angle = 45°. Give your answer to 2 decimal places
Answer: 257.39cm² -
4. Ratio Combining two ratios
a:b is 4:3 and b:c is 8:1. Find a:b:c in its simplest form.
Answer: 32:24:3 -
5. Statistics Averages and range
Find the mean, median and range of: 95, 42, 59, 18, 78, 15, 50
Answer: Mean = 51, Median = 50, Range = 80