Keystones — Capstone
Five GCSE retrieval questions · 29 September 2010 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √735
Answer: 7√15 -
2. Algebra Completing the square
Complete the square: 4x² + 8x
Answer: 4(x + 1)² - 4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 12cm, b = 26cm, angle = 48°. Give your answer to 2 decimal places
Answer: 115.93cm² -
4. Ratio Combining two ratios
a:b is 4:5 and b:c is 4:3. Find a:b:c in its simplest form.
Answer: 16:20:15 -
5. Statistics Averages and range
Find the mean, median and range of: 34, 11, 12, 15, 36, 66, 54, 35. Give your answer to 2 decimal places
Answer: Mean = 32.88, Median = 34.5, Range = 55