Keystones — Capstone
Five GCSE retrieval questions · 2 August 2016 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √320
Answer: 8√5 -
2. Algebra Completing the square
Complete the square: 2x² - 12x - 9
Answer: 2(x - 3)² - 27 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 14cm, b = 26cm, angle = 44°. Give your answer to 2 decimal places
Answer: 126.43cm² -
4. Ratio Combining two ratios
a:b is 5:2 and b:c is 7:8. Find a:b:c in its simplest form.
Answer: 35:14:16 -
5. Statistics Averages and range
Find the mean, median and range of: 56, 63, 79, 51, 77, 20, 24, 44
Answer: Mean = 51.75, Median = 53.5, Range = 59