Keystones — Lintel
Five GCSE retrieval questions · 6 April 2026 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00011
Answer: 1.1 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 16
Answer: (x - 4)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 24cm, angle = 57°. Find adjacent side
Answer: 13.cm -
4. Ratio Mixed ratio problems
Divide 88 in the ratio 3:2:3
Answer: 33, 22 and 33 -
5. Statistics Mean
Calculate the mean of: 9, 50, 16, 37, 37, 32
Answer: 30.2