Keystones — Capstone
Five GCSE retrieval questions · 16 February 2012 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √300
Answer: 10√3 -
2. Algebra Completing the square
Complete the square: 3x² + 24x + 13
Answer: 3(x + 4)² - 35 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 16cm, b = 23cm, angle = 73°. Give your answer to 2 decimal places
Answer: 175.96cm² -
4. Ratio Combining two ratios
a:b is 5:7 and b:c is 3:2. Find a:b:c in its simplest form.
Answer: 15:21:14 -
5. Statistics Averages and range
Find the mean, median and range of: 50, 43, 66, 91, 15, 71, 76, 58
Answer: Mean = 58.75, Median = 62, Range = 76