Keystones — Bedrock
Five GCSE retrieval questions · 6 August 2025 · mathsvault.uk/keystones
-
1. Number
Calculate: 27 + 23
Answer: 27 + 23 = 50 -
2. Algebra
Factorise: 9x + 21
Answer: 3(3x + 7) -
3. Geometry
Opposite = 9cm, hypotenuse = 18cm. Find the angle
Answer: 30° (approximately) -
4. Ratio
Calculate 10% of 64
Answer: 6.4 -
5. Statistics
Find the mean of: 4, 16, 18, 15, 5
Answer: 11.6