Keystones — Lintel
Five GCSE retrieval questions · 22 January 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0099
Answer: 9.9 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 24
Answer: (x - 4)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 56°. Find opposite
Answer: 17.8cm -
4. Ratio Mixed ratio problems
Divide 100 in the ratio 3:3:4
Answer: 30, 30 and 40 -
5. Statistics Mean
Calculate the mean of: 29, 16, 19, 22, 36, 46
Answer: 28