Keystones — Capstone
Five GCSE retrieval questions · 29 June 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 3√112
Answer: 12√7 -
2. Algebra Completing the square
Complete the square: 4x² - 8x - 5
Answer: 4(x - 1)² - 9 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 17cm, b = 15cm, angle = 42°. Give your answer to 2 decimal places
Answer: 85.31cm² -
4. Ratio Combining two ratios
a:b is 4:7 and b:c is 5:8. Find a:b:c in its simplest form.
Answer: 20:35:56 -
5. Statistics Averages and range
Find the mean, median and range of: 21, 100, 50, 95, 33, 95, 74. Give your answer to 2 decimal places
Answer: Mean = 66.86, Median = 74, Range = 79