Keystones — Lintel
Five GCSE retrieval questions · 29 March 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
71000
Answer: 7.1 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 6
Answer: (x + 3)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 13cm, angle = 46°. Find opposite
Answer: 13.5cm -
4. Ratio Mixed ratio problems
£300.00 is shared between A and B in the ratio 1:2. How much does A receive?
Answer: £100.00 -
5. Statistics Mean
The mean of 5 numbers is 28. If 4 of them are 46, 22, 17, 18, what is the missing number?
Answer: 37