Keystones — Capstone
Five GCSE retrieval questions · 5 January 2018 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √539
Answer: 7√11 -
2. Algebra Completing the square
Complete the square: x² - 5x + 6
Answer: (x - 5⁄2)² - 1⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 30cm, b = 24cm, angle = 52°. Give your answer to 2 decimal places
Answer: 283.68cm² -
4. Ratio Combining two ratios
a:b is 2:9 and b:c is 7:8. Find a:b:c in its simplest form.
Answer: 14:63:72 -
5. Statistics Averages and range
Find the mean, median and range of: 57, 66, 64, 96, 54, 39, 69. Give your answer to 2 decimal places
Answer: Mean = 63.57, Median = 64, Range = 57