Keystones — Lintel
Five GCSE retrieval questions · 28 October 2025 · mathsvault.uk/keystones
-
1. Number Converting to standard form
200000
Answer: 2 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 10
Answer: (x - 5)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 17cm, angle = 62°. Find adjacent side
Answer: 8cm -
4. Ratio Mixed ratio problems
Simplify the ratio 7m:700cm
Answer: 1:100 -
5. Statistics Mean
Calculate the mean of: 36, 32, 38, 33, 27, 9, 15
Answer: 27.1