Keystones — Capstone
Five GCSE retrieval questions · 9 July 2013 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √1000
Answer: 10√10 -
2. Algebra Completing the square
Complete the square: 3x² - 12x + 4
Answer: 3(x - 2)² - 8 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 18cm, b = 21cm, angle = 44°. Give your answer to 2 decimal places
Answer: 131.29cm² -
4. Ratio Combining two ratios
a:b is 5:6 and b:c is 5:9. Find a:b:c in its simplest form.
Answer: 25:30:54 -
5. Statistics Averages and range
Find the mean, median and range of: 90, 12, 97, 24, 57, 37, 24. Give your answer to 2 decimal places
Answer: Mean = 48.71, Median = 37, Range = 85