Keystones — Capstone
Five GCSE retrieval questions · 1 December 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √96
Answer: 4√6 -
2. Algebra Completing the square
Complete the square: 5x² + 30x + 11
Answer: 5(x + 3)² - 34 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 27cm, b = 28cm, angle = 65°. Give your answer to 2 decimal places
Answer: 342.58cm² -
4. Ratio Combining two ratios
a:b is 1:8 and b:c is 5:8. Find a:b:c in its simplest form.
Answer: 5:40:64 -
5. Statistics Averages and range
Find the mean, median and range of: 97, 80, 19, 91, 81, 62, 96. Give your answer to 2 decimal places
Answer: Mean = 75.14, Median = 81, Range = 78