Keystones — Capstone
Five GCSE retrieval questions · 24 May 2011 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 3√99
Answer: 9√11 -
2. Algebra Completing the square
Complete the square: 4x² - 40x - 11
Answer: 4(x - 5)² - 111 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 19cm, b = 24cm, angle = 62°. Give your answer to 2 decimal places
Answer: 201.31cm² -
4. Ratio Combining two ratios
a:b is 1:6 and b:c is 9:4. Find a:b:c in its simplest form.
Answer: 3:18:8 -
5. Statistics Averages and range
Find the mean, median and range of: 37, 70, 24, 69, 81, 42, 41
Answer: Mean = 52, Median = 42, Range = 57