Keystones — Lintel
Five GCSE retrieval questions · 26 March 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
660000
Answer: 6.6 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 44°. Find opposite
Answer: 28cm -
4. Ratio Mixed ratio problems
£228.00 is shared between A and B in the ratio 2:1. How much does A receive?
Answer: £152.00 -
5. Statistics Mean
The mean of 5 numbers is 26. If 4 of them are 40, 28, 30, 44, what is the missing number?
Answer: -12