Keystones — Capstone
Five GCSE retrieval questions · 8 April 2011 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √325
Answer: 5√13 -
2. Algebra Completing the square
Complete the square: 4x² - 8x - 10
Answer: 4(x - 1)² - 14 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 18cm, b = 24cm, angle = 45°. Give your answer to 2 decimal places
Answer: 152.74cm² -
4. Ratio Combining two ratios
a:b is 5:2 and b:c is 9:2. Find a:b:c in its simplest form.
Answer: 45:18:4 -
5. Statistics Averages and range
Find the mean, median and range of: 15, 92, 42, 84, 80, 90, 41, 13, 97. Give your answer to 2 decimal places
Answer: Mean = 61.56, Median = 80, Range = 84