Keystones — Lintel
Five GCSE retrieval questions · 5 December 2025 · mathsvault.uk/keystones
-
1. Number Converting to standard form
0.00088
Answer: 8.8 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 8
Answer: (x - 2)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 18cm, angle = 54°. Find opposite
Answer: 24.8cm -
4. Ratio Mixed ratio problems
Simplify: 20:24:8
Answer: 5:6:2 -
5. Statistics Mean
Calculate the mean of: 36, 25, 31, 50, 35, 34
Answer: 35.2