Keystones — Capstone
Five GCSE retrieval questions · 11 October 2017 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √490
Answer: 7√10 -
2. Algebra Completing the square
Complete the square: x² + x
Answer: (x + 1⁄2)² - 1⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 28cm, b = 13cm, angle = 58°. Give your answer to 2 decimal places
Answer: 154.34cm² -
4. Ratio Combining two ratios
a:b is 1:8 and b:c is 5:9. Find a:b:c in its simplest form.
Answer: 5:40:72 -
5. Statistics Averages and range
Find the mean, median and range of: 96, 63, 16, 96, 36, 20, 17, 67. Give your answer to 2 decimal places
Answer: Mean = 51.38, Median = 49.5, Range = 80