Keystones — Capstone
Five GCSE retrieval questions · 13 January 2015 · 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: 2x² - 8x + 14
Answer: 2(x - 2)² + 6 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 15cm, b = 23cm, angle = 62°. Give your answer to 2 decimal places
Answer: 152.31cm² -
4. Ratio Combining two ratios
a:b is 4:5 and b:c is 7:4. Find a:b:c in its simplest form.
Answer: 28:35:20 -
5. Statistics Averages and range
Find the mean, median and range of: 30, 37, 55, 77, 18, 24, 25, 81. Give your answer to 2 decimal places
Answer: Mean = 43.38, Median = 33.5, Range = 63