Keystones — Capstone
Five GCSE retrieval questions · 3 December 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √700
Answer: 10√7 -
2. Algebra Completing the square
Complete the square: x² - x - 1
Answer: (x - 1⁄2)² - 5⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 13cm, b = 29cm, angle = 43°. Give your answer to 2 decimal places
Answer: 128.56cm² -
4. Ratio Combining two ratios
a:b is 7:9 and b:c is 6:5. Find a:b:c in its simplest form.
Answer: 14:18:15 -
5. Statistics Averages and range
Find the mean, median and range of: 84, 89, 63, 94, 12, 44, 77, 15, 14. Give your answer to 2 decimal places
Answer: Mean = 54.67, Median = 63, Range = 82