Keystones — Lintel
Five GCSE retrieval questions · 28 March 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0012
Answer: 1.2 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 14x + 49
Answer: (x - 7)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 15cm, angle = 65°. Find adjacent side
Answer: 6.3cm -
4. Ratio Mixed ratio problems
£360.00 is shared between A and B in the ratio 5:3. How much does A receive?
Answer: £225.00 -
5. Statistics Mean
Calculate the mean of: 10, 31, 23, 24, 12, 8, 19, 43
Answer: 21.3