Keystones — Capstone
Five GCSE retrieval questions · 10 November 2010 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √175
Answer: 5√7 -
2. Algebra Completing the square
Complete the square: 4x² - 40x + 4
Answer: 4(x - 5)² - 96 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 16cm, b = 24cm, angle = 69°. Give your answer to 2 decimal places
Answer: 179.25cm² -
4. Ratio Combining two ratios
a:b is 1:4 and b:c is 9:8. Find a:b:c in its simplest form.
Answer: 9:36:32 -
5. Statistics Averages and range
Find the mean, median and range of: 78, 85, 80, 76, 46, 70, 69, 89. Give your answer to 2 decimal places
Answer: Mean = 74.13, Median = 77, Range = 43