Keystones — Capstone
Five GCSE retrieval questions · 1 January 2014 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 5√250
Answer: 25√10 -
2. Algebra Completing the square
Complete the square: 5x² - 40x + 4
Answer: 5(x - 4)² - 76 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 16cm, b = 15cm, angle = 59°. Give your answer to 2 decimal places
Answer: 102.86cm² -
4. Ratio Combining two ratios
a:b is 5:4 and b:c is 7:9. Find a:b:c in its simplest form.
Answer: 35:28:36 -
5. Statistics Averages and range
Find the mean, median and range of: 10, 33, 64, 35, 78, 13, 46, 13
Answer: Mean = 36.5, Median = 34, Range = 68