Keystones — Cornerstone
Five GCSE retrieval questions · 4 October 2025 · mathsvault.uk/keystones
-
1. Number
Calculate: 89 + 47
Answer: 89 + 47 = 136 -
2. Algebra
Solve: 10x - 5 = 6x + 35
Answer: x = 10 -
3. Geometry
Opposite = 17cm, adjacent = 14cm. Calculate the angle
Answer: 50.5° -
4. Ratio
Simplify: 24:24:20
Answer: 6:6:5 -
5. Statistics
Calculate the mean of: 49, 49, 26, 24, 34, 48
Answer: 38.3