Keystones — Capstone
Five GCSE retrieval questions · 21 November 2022 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √363
Answer: 11√3 -
2. Algebra Completing the square
Complete the square: x² + 5x
Answer: (x + 2.5)² - 6.25 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 25cm, b = 27cm, angle = 57°
Answer: 283.cm² -
4. Ratio Combining two ratios
a:b is 2:1 and b:c is 2:3. Find a:b:c.
Answer: 8:4:6 -
5. Statistics Averages and range
Find the mean, median and range of: 92, 55, 83, 66, 85, 23, 75, 100, 67
Answer: Mean = 71.8, Median = 75, Range = 77