Keystones — Lintel
Five GCSE retrieval questions · 9 May 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
1000000
Answer: 1 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x - 8
Answer: (x + 8)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 59°. Find opposite
Answer: 33.3cm -
4. Ratio Mixed ratio problems
Simplify: 8:10:4
Answer: 4:5:2 -
5. Statistics Mean
The mean of 4 numbers is 37. If 3 of them are 44, 46, 19, what is the missing number?
Answer: 39