Keystones — Lintel
Five GCSE retrieval questions · 18 August 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00023
Answer: 2.3 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 12
Answer: (x + 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 45°. Find opposite
Answer: 29cm -
4. Ratio Mixed ratio problems
Simplify the ratio 6m:600cm
Answer: 1:100 -
5. Statistics Mean
Calculate the mean of: 30, 9, 35, 43, 20, 46, 22, 49
Answer: 31.8