Keystones — Capstone
Five GCSE retrieval questions · 10 November 2016 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √891
Answer: 9√11 -
2. Algebra Completing the square
Complete the square: x² + x - 11
Answer: (x + 1⁄2)² - 45⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 26cm, b = 17cm, angle = 59°. Give your answer to 2 decimal places
Answer: 189.43cm² -
4. Ratio Combining two ratios
a:b is 4:9 and b:c is 6:1. Find a:b:c in its simplest form.
Answer: 8:18:3 -
5. Statistics Averages and range
Find the mean, median and range of: 65, 73, 95, 65, 61, 38, 66, 74. Give your answer to 2 decimal places
Answer: Mean = 67.13, Median = 65.5, Range = 57