Keystones — Capstone
Five GCSE retrieval questions · 12 May 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √756
Answer: 6√21 -
2. Algebra Completing the square
Complete the square: 4x² - 32x + 3
Answer: 4(x - 4)² - 61 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 21cm, b = 20cm, angle = 73°. Give your answer to 2 decimal places
Answer: 200.82cm² -
4. Ratio Combining two ratios
a:b is 1:4 and b:c is 5:9. Find a:b:c in its simplest form.
Answer: 5:20:36 -
5. Statistics Averages and range
Find the mean, median and range of: 44, 91, 64, 83, 89, 35, 37. Give your answer to 2 decimal places
Answer: Mean = 63.29, Median = 64, Range = 56