Keystones — Capstone
Five GCSE retrieval questions · 19 June 2016 · 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: 4x² - 32x - 5
Answer: 4(x - 4)² - 69 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 12cm, b = 20cm, angle = 66°. Give your answer to 2 decimal places
Answer: 109.63cm² -
4. Ratio Combining two ratios
a:b is 9:2 and b:c is 3:4. Find a:b:c in its simplest form.
Answer: 27:6:8 -
5. Statistics Averages and range
Find the mean, median and range of: 86, 27, 85, 15, 13, 10, 29. Give your answer to 2 decimal places
Answer: Mean = 37.86, Median = 27, Range = 76