Keystones — Capstone
Five GCSE retrieval questions · 23 May 2011 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 4√24
Answer: 8√6 -
2. Algebra Completing the square
Complete the square: 4x² - 24x
Answer: 4(x - 3)² - 36 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 25cm, b = 30cm, angle = 79°. Give your answer to 2 decimal places
Answer: 368.11cm² -
4. Ratio Combining two ratios
a:b is 1:7 and b:c is 5:2. Find a:b:c in its simplest form.
Answer: 5:35:14 -
5. Statistics Averages and range
Find the mean, median and range of: 47, 63, 43, 34, 31, 27, 49
Answer: Mean = 42, Median = 43, Range = 36