Keystones — Lintel
Five GCSE retrieval questions · 19 February 2025 · mathsvault.uk/keystones
-
1. Number Converting to standard form
4800000
Answer: 4.8 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 42
Answer: (x + 7)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 36°. Find opposite
Answer: 18.2cm -
4. Ratio Mixed ratio problems
Simplify the ratio 2m:200cm
Answer: 1:100 -
5. Statistics Mean
Calculate the mean of: 50, 8, 32, 10, 38, 31, 21, 35
Answer: 28.1