Keystones — Capstone
Five GCSE retrieval questions · 10 June 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 4√18
Answer: 12√2 -
2. Algebra Completing the square
Complete the square: 3x² + 12x - 10
Answer: 3(x + 2)² - 22 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 20cm, b = 26cm, angle = 71°. Give your answer to 2 decimal places
Answer: 245.83cm² -
4. Ratio Combining two ratios
a:b is 6:7 and b:c is 6:5. Find a:b:c in its simplest form.
Answer: 36:42:35 -
5. Statistics Averages and range
Find the mean, median and range of: 88, 69, 49, 75, 69, 77, 96, 99, 59. Give your answer to 2 decimal places
Answer: Mean = 75.67, Median = 75, Range = 50