Keystones — Capstone
Five GCSE retrieval questions · 22 March 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √216
Answer: 6√6 -
2. Algebra Completing the square
Complete the square: 4x² + 40x - 11
Answer: 4(x + 5)² - 111 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 13cm, b = 24cm, angle = 65°. Give your answer to 2 decimal places
Answer: 141.38cm² -
4. Ratio Combining two ratios
a:b is 3:5 and b:c is 3:2. Find a:b:c in its simplest form.
Answer: 9:15:10 -
5. Statistics Averages and range
Find the mean, median and range of: 88, 55, 71, 47, 14, 16, 47, 100
Answer: Mean = 54.75, Median = 51, Range = 86