Keystones — Capstone
Five GCSE retrieval questions · 28 April 2017 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √147
Answer: 7√3 -
2. Algebra Completing the square
Complete the square: 2x² - 16x + 12
Answer: 2(x - 4)² - 20 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 15cm, b = 14cm, angle = 42°. Give your answer to 2 decimal places
Answer: 70.26cm² -
4. Ratio Combining two ratios
a:b is 5:6 and b:c is 7:4. Find a:b:c in its simplest form.
Answer: 35:42:24 -
5. Statistics Averages and range
Find the mean, median and range of: 100, 89, 86, 60, 65, 69, 60, 16. Give your answer to 2 decimal places
Answer: Mean = 68.13, Median = 67, Range = 84