Keystones — Capstone
Five GCSE retrieval questions · 25 June 2014 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 2√45
Answer: 6√5 -
2. Algebra Completing the square
Complete the square: 2x² - 8x - 13
Answer: 2(x - 2)² - 21 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 16cm, b = 26cm, angle = 64°. Give your answer to 2 decimal places
Answer: 186.95cm² -
4. Ratio Combining two ratios
a:b is 5:3 and b:c is 7:4. Find a:b:c in its simplest form.
Answer: 35:21:12 -
5. Statistics Averages and range
Find the mean, median and range of: 24, 47, 62, 72, 69, 95, 97. Give your answer to 2 decimal places
Answer: Mean = 66.57, Median = 69, Range = 73