Keystones — Lintel
Five GCSE retrieval questions · 20 February 2026 · mathsvault.uk/keystones
-
1. Number
Calculate: 990 + 818
Answer: 1808 -
2. Algebra
Find the next term: 1, 3, 7, 13, ...
Answer: 21 -
3. Geometry
Adjacent = 21cm, hypotenuse = 35cm. Find the angle
Answer: 53.1° -
4. Ratio
Simplify: 9:18:6
Answer: 3:6:2 -
5. Statistics
Calculate the mean of: 21, 29, 37, 15, 32, 44
Answer: 29.7