Keystones — Capstone
Five GCSE retrieval questions · 5 June 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √704
Answer: 8√11 -
2. Algebra Completing the square
Complete the square: 5x² - 60x + 2
Answer: 5(x - 6)² - 178 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 21cm, b = 21cm, angle = 53°. Give your answer to 2 decimal places
Answer: 176.cm² -
4. Ratio Combining two ratios
a:b is 7:4 and b:c is 3:2. Find a:b:c in its simplest form.
Answer: 21:12:8 -
5. Statistics Averages and range
Find the mean, median and range of: 23, 10, 87, 19, 38, 95, 29, 58, 29. Give your answer to 2 decimal places
Answer: Mean = 43.11, Median = 29, Range = 85