Keystones — Lintel
Five GCSE retrieval questions · 6 June 2026 · mathsvault.uk/keystones
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1. Number
What is ∛64?
Answer: 4 -
2. Algebra
Factorise fully: 6x² + 18x
Answer: 3x(2x + 6) -
3. Geometry
Find c if a = 11cm and b = 25cm in a right triangle
Answer: 27.3cm -
4. Ratio
Find 80% of 128
Answer: 102.4 -
5. Statistics
Calculate the mean of: 30, 24, 25, 46, 39, 28, 9, 47
Answer: 31