Keystones — Capstone
Five GCSE retrieval questions · 26 June 2014 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √294
Answer: 7√6 -
2. Algebra Completing the square
Complete the square: 3x² + 12x + 14
Answer: 3(x + 2)² + 2 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 29cm, b = 20cm, angle = 69°. Give your answer to 2 decimal places
Answer: 270.74cm² -
4. Ratio Combining two ratios
a:b is 6:5 and b:c is 9:2. Find a:b:c in its simplest form.
Answer: 54:45:10 -
5. Statistics Averages and range
Find the mean, median and range of: 42, 26, 70, 22, 51, 33, 64, 38
Answer: Mean = 43.25, Median = 40, Range = 48