Keystones — Capstone
Five GCSE retrieval questions · 22 May 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √216
Answer: 6√6 -
2. Algebra Completing the square
Complete the square: 4x² - 32x - 2
Answer: 4(x - 4)² - 66 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 17cm, b = 30cm, angle = 40°. Give your answer to 2 decimal places
Answer: 163.91cm² -
4. Ratio Combining two ratios
a:b is 9:5 and b:c is 7:9. Find a:b:c in its simplest form.
Answer: 63:35:45 -
5. Statistics Averages and range
Find the mean, median and range of: 76, 65, 20, 79, 14, 53, 44. Give your answer to 2 decimal places
Answer: Mean = 50.14, Median = 53, Range = 65