Keystones — Capstone
Five GCSE retrieval questions · 15 August 2014 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √160
Answer: 4√10 -
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 = 24cm, b = 26cm, angle = 64°. Give your answer to 2 decimal places
Answer: 280.42cm² -
4. Ratio Combining two ratios
a:b is 5:6 and b:c is 7:3. Find a:b:c in its simplest form.
Answer: 35:42:18 -
5. Statistics Averages and range
Find the mean, median and range of: 69, 11, 79, 82, 39, 28, 49, 17
Answer: Mean = 46.75, Median = 44, Range = 71