Keystones — Lintel
Five GCSE retrieval questions · 4 January 2026 · mathsvault.uk/keystones
-
1. Number Converting to standard form
400000
Answer: 4 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 20
Answer: (x + 5)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 14cm, angle = 52°. Find opposite
Answer: 17.9cm -
4. Ratio Mixed ratio problems
Simplify: 6:4:10
Answer: 3:2:5 -
5. Statistics Mean
Calculate the mean of: 17, 23, 8, 11, 45, 49, 10
Answer: 23.3