Keystones — Capstone
Five GCSE retrieval questions · 22 June 2016 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: 4√63
Answer: 12√7 -
2. Algebra Completing the square
Complete the square: x² - 11x
Answer: (x - 11⁄2)² - 121⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 24cm, b = 15cm, angle = 69°. Give your answer to 2 decimal places
Answer: 168.04cm² -
4. Ratio Combining two ratios
a:b is 7:9 and b:c is 7:6. Find a:b:c in its simplest form.
Answer: 49:63:54 -
5. Statistics Averages and range
Find the mean, median and range of: 62, 77, 33, 81, 59, 63, 28, 67
Answer: Mean = 58.75, Median = 62.5, Range = 53