Keystones — Capstone
Five GCSE retrieval questions · 11 February 2018 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √704
Answer: 8√11 -
2. Algebra Completing the square
Complete the square: 2x² - 16x - 4
Answer: 2(x - 4)² - 36 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 29cm, b = 14cm, angle = 62°. Give your answer to 2 decimal places
Answer: 179.24cm² -
4. Ratio Combining two ratios
a:b is 2:9 and b:c is 7:3. Find a:b:c in its simplest form.
Answer: 14:63:27 -
5. Statistics Averages and range
Find the mean, median and range of: 24, 10, 24, 76, 75, 69, 22, 42, 63
Answer: Mean = 45, Median = 42, Range = 66