Keystones — Cornerstone
Five GCSE retrieval questions · 22 May 2026 · mathsvault.uk/keystones
-
1. Number
What is the missing number: 85 + ? = 135
Answer: 50 -
2. Algebra
Solve: x + 6 = 17
Answer: x = 11 -
3. Geometry
Calculate the area of a circle with diameter 10cm
Answer: 78.54cm² -
4. Ratio
Simplify: 12:12:4
Answer: 3:3:1 -
5. Statistics
Find the mean of: 15, 12, 13
Answer: 13.333333333333