Keystones — Capstone
Five GCSE retrieval questions · 19 October 2013 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 5√8
Answer: 10√2 -
2. Algebra Completing the square
Complete the square: 3x² - 36x + 7
Answer: 3(x - 6)² - 101 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 29cm, b = 17cm, angle = 52°. Give your answer to 2 decimal places
Answer: 194.24cm² -
4. Ratio Combining two ratios
a:b is 4:5 and b:c is 6:5. Find a:b:c in its simplest form.
Answer: 24:30:25 -
5. Statistics Averages and range
Find the mean, median and range of: 35, 65, 55, 41, 96, 70, 13, 67
Answer: Mean = 55.25, Median = 60, Range = 83