Keystones — Capstone
Five GCSE retrieval questions · 15 June 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 4√20
Answer: 8√5 -
2. Algebra Completing the square
Complete the square: 4x² - 16x + 3
Answer: 4(x - 2)² - 13 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 24cm, b = 14cm, angle = 65°. Give your answer to 2 decimal places
Answer: 152.26cm² -
4. Ratio Combining two ratios
a:b is 5:3 and b:c is 5:6. Find a:b:c in its simplest form.
Answer: 25:15:18 -
5. Statistics Averages and range
Find the mean, median and range of: 93, 89, 31, 74, 16, 87, 21. Give your answer to 2 decimal places
Answer: Mean = 58.71, Median = 74, Range = 77