Keystones — Capstone
Five GCSE retrieval questions · 12 April 2016 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √363
Answer: 11√3 -
2. Algebra Completing the square
Complete the square: x² + 5x
Answer: (x + 5⁄2)² - 25⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 16cm, b = 26cm, angle = 42°. Give your answer to 2 decimal places
Answer: 139.18cm² -
4. Ratio Combining two ratios
a:b is 6:7 and b:c is 3:8. Find a:b:c in its simplest form.
Answer: 18:21:56 -
5. Statistics Averages and range
Find the mean, median and range of: 81, 96, 90, 23, 27, 51, 80
Answer: Mean = 64, Median = 80, Range = 73