Keystones — Capstone
Five GCSE retrieval questions · 24 July 2022 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √363
Answer: 11√3 -
2. Algebra Completing the square
Complete the square: x² + 4.4x
Answer: (x + 2.2)² - 4.84 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 30cm, b = 18cm, angle = 57°
Answer: 226.4cm² -
4. Ratio Combining two ratios
a:b is 4:3 and b:c is 4:3. Find a:b:c.
Answer: 16:12:9 -
5. Statistics Averages and range
Find the mean, median and range of: 90, 36, 62, 23, 42, 32, 19, 44
Answer: Mean = 43.5, Median = 42, Range = 71