Keystones — Capstone
Five GCSE retrieval questions · 24 February 2013 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 5√44
Answer: 10√11 -
2. Algebra Completing the square
Complete the square: 3x² - 12x - 4
Answer: 3(x - 2)² - 16 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 28cm, b = 24cm, angle = 71°. Give your answer to 2 decimal places
Answer: 317.69cm² -
4. Ratio Combining two ratios
a:b is 3:8 and b:c is 3:5. Find a:b:c in its simplest form.
Answer: 9:24:40 -
5. Statistics Averages and range
Find the mean, median and range of: 44, 31, 98, 13, 77, 59, 25, 17, 55. Give your answer to 2 decimal places
Answer: Mean = 46.56, Median = 44, Range = 85