Keystones — Capstone
Five GCSE retrieval questions · 4 August 2022 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √200
Answer: 10√2 -
2. Algebra Completing the square
Complete the square: x² + 6x
Answer: (x + 3)² - 9 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 30cm, b = 23cm, angle = 62°
Answer: 304.6cm² -
4. Ratio Combining two ratios
a:b is 3:2 and b:c is 4:5. Find a:b:c.
Answer: 6:4:5 -
5. Statistics Averages and range
Find the mean, median and range of: 87, 22, 34, 41, 67, 23, 65, 81, 60
Answer: Mean = 53.3, Median = 60, Range = 65