Keystones — Capstone
Five GCSE retrieval questions · 12 September 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √605
Answer: 11√5 -
2. Algebra Completing the square
Complete the square: 4x² - 32x + 6
Answer: 4(x - 4)² - 58 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 26cm, b = 25cm, angle = 56°. Give your answer to 2 decimal places
Answer: 269.44cm² -
4. Ratio Combining two ratios
a:b is 3:5 and b:c is 9:4. Find a:b:c in its simplest form.
Answer: 27:45:20 -
5. Statistics Averages and range
Find the mean, median and range of: 95, 67, 85, 58, 81, 20, 75. Give your answer to 2 decimal places
Answer: Mean = 68.71, Median = 75, Range = 75