Keystones — Capstone
Five GCSE retrieval questions · 28 April 2012 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √112
Answer: 4√7 -
2. Algebra Completing the square
Complete the square: x² + x + 3
Answer: (x + 1⁄2)² + 11⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 18cm, b = 15cm, angle = 56°. Give your answer to 2 decimal places
Answer: 111.92cm² -
4. Ratio Combining two ratios
a:b is 8:7 and b:c is 3:5. Find a:b:c in its simplest form.
Answer: 24:21:35 -
5. Statistics Averages and range
Find the mean, median and range of: 89, 95, 49, 63, 86, 35, 14. Give your answer to 2 decimal places
Answer: Mean = 61.57, Median = 63, Range = 81