Keystones — Capstone
Five GCSE retrieval questions · 4 May 2014 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 5√99
Answer: 15√11 -
2. Algebra Completing the square
Complete the square: 4x² - 32x + 1
Answer: 4(x - 4)² - 63 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 26cm, b = 19cm, angle = 71°. Give your answer to 2 decimal places
Answer: 233.54cm² -
4. Ratio Combining two ratios
a:b is 6:7 and b:c is 5:4. Find a:b:c in its simplest form.
Answer: 30:35:28 -
5. Statistics Averages and range
Find the mean, median and range of: 19, 98, 76, 98, 76, 75, 91, 52. Give your answer to 2 decimal places
Answer: Mean = 73.13, Median = 76, Range = 79