Keystones — Lintel
Five GCSE retrieval questions · 9 December 2025 · mathsvault.uk/keystones
-
1. Number Converting to standard form
65000000
Answer: 6.5 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 24
Answer: (x - 4)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 39cm, angle = 45°. Find adjacent side
Answer: 27.6cm -
4. Ratio Mixed ratio problems
Express the first part of 3:5 as a fraction in simplest form
Answer: 3⁄8 -
5. Statistics Mean
Calculate the mean of: 18, 36, 37, 42, 39, 10
Answer: 30.3