Keystones — Capstone
Five GCSE retrieval questions · 28 May 2015 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 4√160
Answer: 16√10 -
2. Algebra Completing the square
Complete the square: 5x² - 60x + 12
Answer: 5(x - 6)² - 168 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 14cm, b = 14cm, angle = 80°. Give your answer to 2 decimal places
Answer: 96.51cm² -
4. Ratio Combining two ratios
a:b is 6:7 and b:c is 9:4. Find a:b:c in its simplest form.
Answer: 54:63:28 -
5. Statistics Averages and range
Find the mean, median and range of: 44, 44, 37, 35, 67, 74, 58, 98. Give your answer to 2 decimal places
Answer: Mean = 57.13, Median = 51, Range = 63