Keystones — Capstone
Five GCSE retrieval questions · 10 September 2010 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √735
Answer: 7√15 -
2. Algebra Completing the square
Complete the square: 4x² + 48x - 14
Answer: 4(x + 6)² - 158 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 29cm, b = 17cm, angle = 50°. Give your answer to 2 decimal places
Answer: 188.83cm² -
4. Ratio Combining two ratios
a:b is 1:2 and b:c is 9:7. Find a:b:c in its simplest form.
Answer: 9:18:14 -
5. Statistics Averages and range
Find the mean, median and range of: 78, 87, 27, 36, 44, 66, 77, 52, 63. Give your answer to 2 decimal places
Answer: Mean = 58.89, Median = 63, Range = 60