Keystones — Lintel
Five GCSE retrieval questions · 23 January 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
8700000
Answer: 8.7 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 56
Answer: (x + 8)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 38cm, angle = 42°. Find adjacent side
Answer: 28.2cm -
4. Ratio Mixed ratio problems
Simplify: 10:10:6
Answer: 5:5:3 -
5. Statistics Mean
The mean of 6 numbers is 37. If 5 of them are 32, 49, 20, 32, 35, what is the missing number?
Answer: 54