Keystones — Capstone
Five GCSE retrieval questions · 29 August 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 4√8
Answer: 8√2 -
2. Algebra Completing the square
Complete the square: 4x² - 8x - 13
Answer: 4(x - 1)² - 17 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 12cm, b = 18cm, angle = 65°. Give your answer to 2 decimal places
Answer: 97.88cm² -
4. Ratio Combining two ratios
a:b is 1:9 and b:c is 7:4. Find a:b:c in its simplest form.
Answer: 7:63:36 -
5. Statistics Averages and range
Find the mean, median and range of: 96, 47, 73, 18, 18, 30, 58. Give your answer to 2 decimal places
Answer: Mean = 48.57, Median = 47, Range = 78