Keystones — Capstone
Five GCSE retrieval questions · 4 November 2016 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: 2√275
Answer: 10√11 -
2. Algebra Completing the square
Complete the square: 2x² - 4x + 6
Answer: 2(x - 1)² + 4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 23cm, b = 27cm, angle = 77°. Give your answer to 2 decimal places
Answer: 302.54cm² -
4. Ratio Combining two ratios
a:b is 7:5 and b:c is 7:2. Find a:b:c in its simplest form.
Answer: 49:35:10 -
5. Statistics Averages and range
Find the mean, median and range of: 54, 92, 43, 61, 73, 90, 11. Give your answer to 2 decimal places
Answer: Mean = 60.57, Median = 61, Range = 81