Keystones — Capstone
Five GCSE retrieval questions · 4 November 2022 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √125
Answer: 5√5 -
2. Algebra Completing the square
Complete the square: x² + 5.8x
Answer: (x + 2.9)² - 8.41 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 14cm, b = 28cm, angle = 59°
Answer: 168cm² -
4. Ratio Combining two ratios
a:b is 3:4 and b:c is 4:3. Find a:b:c.
Answer: 3:4:3 -
5. Statistics Averages and range
Find the mean, median and range of: 47, 25, 80, 87, 66, 14, 39, 44
Answer: Mean = 50.3, Median = 47, Range = 73