Keystones — Capstone
Five GCSE retrieval questions · 8 June 2013 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 4√45
Answer: 12√5 -
2. Algebra Completing the square
Complete the square: 4x² - 16x + 2
Answer: 4(x - 2)² - 14 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 12cm, b = 19cm, angle = 64°. Give your answer to 2 decimal places
Answer: 102.46cm² -
4. Ratio Combining two ratios
a:b is 1:5 and b:c is 3:2. Find a:b:c in its simplest form.
Answer: 3:15:10 -
5. Statistics Averages and range
Find the mean, median and range of: 69, 93, 20, 56, 46, 76, 54. Give your answer to 2 decimal places
Answer: Mean = 59.14, Median = 56, Range = 73