Keystones — Lintel
Five GCSE retrieval questions · 27 April 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
5300000
Answer: 5.3 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 4
Answer: (x + 4)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 38cm, angle = 29°. Find adjacent side
Answer: 33.2cm -
4. Ratio Mixed ratio problems
£376.00 is shared between A and B in the ratio 5:3. How much does A receive?
Answer: £235.00 -
5. Statistics Mean
The mean of 6 numbers is 27. If 5 of them are 41, 35, 41, 32, 50, what is the missing number?
Answer: -37