Keystones — Capstone
Five GCSE retrieval questions · 27 September 2014 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 4√44
Answer: 8√11 -
2. Algebra Completing the square
Complete the square: 2x² + 4x + 1
Answer: 2(x + 1)² - 1 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 27cm, b = 30cm, angle = 71°. Give your answer to 2 decimal places
Answer: 382.94cm² -
4. Ratio Combining two ratios
a:b is 9:4 and b:c is 5:4. Find a:b:c in its simplest form.
Answer: 45:20:16 -
5. Statistics Averages and range
Find the mean, median and range of: 90, 11, 85, 49, 68, 94, 66, 93
Answer: Mean = 69.5, Median = 76.5, Range = 83