Keystones — Lintel
Five GCSE retrieval questions · 30 May 2026 · mathsvault.uk/keystones
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1. Number Converting to standard form
46000000
Answer: 4.6 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 24
Answer: (x - 4)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 32°. Find opposite
Answer: 11.9cm -
4. Ratio Mixed ratio problems
£329.00 is shared between A and B in the ratio 4:3. How much does A receive?
Answer: £188.00 -
5. Statistics Mean
The mean of 4 numbers is 23. If 3 of them are 49, 33, 27, what is the missing number?
Answer: -17