Keystones — Cornerstone
Five GCSE retrieval questions · 22 April 2025 · mathsvault.uk/keystones
-
1. Number
Calculate: 41 + 65
Answer: 41 + 65 = 106 -
2. Algebra
Solve: 9x = 108
Answer: x = 12 -
3. Geometry
Find the area of a right triangle with base 5cm and height 8cm
Answer: 20cm² -
4. Ratio
Simplify: 15:12:6
Answer: 5:4:2 -
5. Statistics
Calculate the mean of: 8, 7, 17, 6, 21, 46, 16
Answer: 17.3