Keystones — Capstone
Five GCSE retrieval questions · 8 May 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 2√99
Answer: 6√11 -
2. Algebra Completing the square
Complete the square: 3x² + 6x + 8
Answer: 3(x + 1)² + 5 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 15cm, b = 28cm, angle = 62°. Give your answer to 2 decimal places
Answer: 185.42cm² -
4. Ratio Combining two ratios
a:b is 7:2 and b:c is 9:7. Find a:b:c in its simplest form.
Answer: 63:18:14 -
5. Statistics Averages and range
Find the mean, median and range of: 20, 21, 12, 36, 30, 62, 59. Give your answer to 2 decimal places
Answer: Mean = 34.29, Median = 30, Range = 50