Keystones — Capstone
Five GCSE retrieval questions · 24 April 2013 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √180
Answer: 6√5 -
2. Algebra Completing the square
Complete the square: 4x² - 24x - 7
Answer: 4(x - 3)² - 43 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 27cm, b = 26cm, angle = 56°. Give your answer to 2 decimal places
Answer: 290.99cm² -
4. Ratio Combining two ratios
a:b is 1:8 and b:c is 3:5. Find a:b:c in its simplest form.
Answer: 3:24:40 -
5. Statistics Averages and range
Find the mean, median and range of: 28, 57, 33, 31, 65, 42, 53. Give your answer to 2 decimal places
Answer: Mean = 44.14, Median = 42, Range = 37