Keystones — Lintel
Five GCSE retrieval questions · 16 July 2025 · mathsvault.uk/keystones
-
1. Number Converting to standard form
0.0086
Answer: 8.6 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 12
Answer: (x + 6)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 40cm, angle = 57°. Find adjacent side
Answer: 21.8cm -
4. Ratio Mixed ratio problems
£350.00 is shared between A and B in the ratio 2:5. How much does A receive?
Answer: £100.00 -
5. Statistics Mean
The mean of 4 numbers is 40. If 3 of them are 38, 18, 18, what is the missing number?
Answer: 86