Keystones — Capstone
Five GCSE retrieval questions · 9 June 2015 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √360
Answer: 6√10 -
2. Algebra Completing the square
Complete the square: 3x² - 36x - 4
Answer: 3(x - 6)² - 112 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 25cm, b = 26cm, angle = 57°. Give your answer to 2 decimal places
Answer: 272.57cm² -
4. Ratio Combining two ratios
a:b is 7:6 and b:c is 4:7. Find a:b:c in its simplest form.
Answer: 14:12:21 -
5. Statistics Averages and range
Find the mean, median and range of: 75, 26, 32, 81, 70, 72, 29, 63, 40. Give your answer to 2 decimal places
Answer: Mean = 54.22, Median = 63, Range = 55