Keystones — Lintel
Five GCSE retrieval questions · 29 May 2026 · mathsvault.uk/keystones
-
1. Number Converting to standard form
97000000
Answer: 9.7 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 26cm, angle = 38°. Find adjacent side
Answer: 20.5cm -
4. Ratio Mixed ratio problems
£308.00 is shared between A and B in the ratio 3:4. How much does A receive?
Answer: £132.00 -
5. Statistics Mean
The mean of 6 numbers is 32. If 5 of them are 41, 27, 29, 29, 31, what is the missing number?
Answer: 35