Keystones — Capstone
Five GCSE retrieval questions · 24 July 2012 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: 3√12
Answer: 6√3 -
2. Algebra Completing the square
Complete the square: 5x² - 10x + 1
Answer: 5(x - 1)² - 4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 15cm, b = 26cm, angle = 59°. Give your answer to 2 decimal places
Answer: 167.15cm² -
4. Ratio Combining two ratios
a:b is 2:7 and b:c is 3:5. Find a:b:c in its simplest form.
Answer: 6:21:35 -
5. Statistics Averages and range
Find the mean, median and range of: 41, 44, 50, 25, 68, 34, 87. Give your answer to 2 decimal places
Answer: Mean = 49.86, Median = 44, Range = 62