Keystones — Capstone
Five GCSE retrieval questions · 17 May 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 4√54
Answer: 12√6 -
2. Algebra Completing the square
Complete the square: 4x² - 16x - 9
Answer: 4(x - 2)² - 25 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 26cm, b = 29cm, angle = 58°. Give your answer to 2 decimal places
Answer: 319.71cm² -
4. Ratio Combining two ratios
a:b is 8:7 and b:c is 9:2. Find a:b:c in its simplest form.
Answer: 72:63:14 -
5. Statistics Averages and range
Find the mean, median and range of: 57, 68, 64, 87, 75, 23, 75. Give your answer to 2 decimal places
Answer: Mean = 64.14, Median = 68, Range = 64