Keystones — Capstone
Five GCSE retrieval questions · 2 August 2013 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 2√44
Answer: 4√11 -
2. Algebra Completing the square
Complete the square: 3x² + 6x - 5
Answer: 3(x + 1)² - 8 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 12cm, b = 22cm, angle = 50°. Give your answer to 2 decimal places
Answer: 101.12cm² -
4. Ratio Combining two ratios
a:b is 9:2 and b:c is 5:7. Find a:b:c in its simplest form.
Answer: 45:10:14 -
5. Statistics Averages and range
Find the mean, median and range of: 47, 69, 37, 99, 37, 53, 38. Give your answer to 2 decimal places
Answer: Mean = 54.29, Median = 47, Range = 62