Keystones — Capstone
Five GCSE retrieval questions · 29 March 2011 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √832
Answer: 8√13 -
2. Algebra Completing the square
Complete the square: 5x² - 60x - 6
Answer: 5(x - 6)² - 186 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 13cm, b = 27cm, angle = 75°. Give your answer to 2 decimal places
Answer: 169.52cm² -
4. Ratio Combining two ratios
a:b is 6:7 and b:c is 5:4. Find a:b:c in its simplest form.
Answer: 30:35:28 -
5. Statistics Averages and range
Find the mean, median and range of: 80, 52, 39, 79, 92, 65, 64, 56. Give your answer to 2 decimal places
Answer: Mean = 65.88, Median = 64.5, Range = 53