Keystones — Capstone
Five GCSE retrieval questions · 11 May 2011 · 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: 5x² - 10x + 1
Answer: 5(x - 1)² - 4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 24cm, b = 29cm, angle = 68°. Give your answer to 2 decimal places
Answer: 322.66cm² -
4. Ratio Combining two ratios
a:b is 7:9 and b:c is 4:1. Find a:b:c in its simplest form.
Answer: 28:36:9 -
5. Statistics Averages and range
Find the mean, median and range of: 78, 20, 12, 60, 12, 68, 61. Give your answer to 2 decimal places
Answer: Mean = 44.43, Median = 60, Range = 66