Keystones — Capstone
Five GCSE retrieval questions · 27 February 2018 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √896
Answer: 8√14 -
2. Algebra Completing the square
Complete the square: x² + x + 12
Answer: (x + 1⁄2)² + 47⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 15cm, b = 18cm, angle = 57°. Give your answer to 2 decimal places
Answer: 113.22cm² -
4. Ratio Combining two ratios
a:b is 3:2 and b:c is 3:5. Find a:b:c in its simplest form.
Answer: 9:6:10 -
5. Statistics Averages and range
Find the mean, median and range of: 68, 74, 45, 16, 20, 38, 40, 28. Give your answer to 2 decimal places
Answer: Mean = 41.13, Median = 39, Range = 58