Keystones — Capstone
Five GCSE retrieval questions · 25 August 2016 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √294
Answer: 7√6 -
2. Algebra Completing the square
Complete the square: x² - x + 1
Answer: (x - 1⁄2)² + 3⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 26cm, b = 20cm, angle = 68°. Give your answer to 2 decimal places
Answer: 241.07cm² -
4. Ratio Combining two ratios
a:b is 1:2 and b:c is 3:2. Find a:b:c in its simplest form.
Answer: 3:6:4 -
5. Statistics Averages and range
Find the mean, median and range of: 30, 90, 66, 39, 61, 72, 14. Give your answer to 2 decimal places
Answer: Mean = 53.14, Median = 61, Range = 76