Keystones — Capstone
Five GCSE retrieval questions · 4 November 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √500
Answer: 10√5 -
2. Algebra Completing the square
Complete the square: x² - 3x + 2
Answer: (x - 3⁄2)² - 1⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 30cm, b = 25cm, angle = 49°. Give your answer to 2 decimal places
Answer: 283.02cm² -
4. Ratio Combining two ratios
a:b is 5:8 and b:c is 6:1. Find a:b:c in its simplest form.
Answer: 15:24:4 -
5. Statistics Averages and range
Find the mean, median and range of: 59, 58, 98, 45, 11, 51, 14, 30
Answer: Mean = 45.75, Median = 48, Range = 87