Keystones — Capstone
Five GCSE retrieval questions · 19 October 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √1000
Answer: 10√10 -
2. Algebra Completing the square
Complete the square: 3x² - 12x - 1
Answer: 3(x - 2)² - 13 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 17cm, b = 22cm, angle = 40°. Give your answer to 2 decimal places
Answer: 120.2cm² -
4. Ratio Combining two ratios
a:b is 9:8 and b:c is 3:7. Find a:b:c in its simplest form.
Answer: 27:24:56 -
5. Statistics Averages and range
Find the mean, median and range of: 75, 59, 18, 46, 94, 97, 29, 77, 92. Give your answer to 2 decimal places
Answer: Mean = 65.22, Median = 75, Range = 79