Keystones — Lintel
Five GCSE retrieval questions · 19 October 2025 · mathsvault.uk/keystones
-
1. Number Converting to standard form
0.008
Answer: 8 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 18
Answer: (x - 3)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 21cm, angle = 55°. Find opposite
Answer: 30cm -
4. Ratio Mixed ratio problems
£300.00 is shared between A and B in the ratio 1:2. How much does A receive?
Answer: £100.00 -
5. Statistics Mean
Calculate the mean of: 43, 42, 27, 18, 45, 27, 41
Answer: 34.7