Keystones — Capstone
Five GCSE retrieval questions · 13 December 2011 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √352
Answer: 4√22 -
2. Algebra Completing the square
Complete the square: x² + 3x - 1
Answer: (x + 3⁄2)² - 13⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 29cm, b = 24cm, angle = 76°. Give your answer to 2 decimal places
Answer: 337.66cm² -
4. Ratio Combining two ratios
a:b is 4:5 and b:c is 3:4. Find a:b:c in its simplest form.
Answer: 12:15:20 -
5. Statistics Averages and range
Find the mean, median and range of: 64, 22, 40, 11, 75, 95, 35. Give your answer to 2 decimal places
Answer: Mean = 48.86, Median = 40, Range = 84