Keystones — Lintel
Five GCSE retrieval questions · 20 October 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0067
Answer: 6.7 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 30cm, angle = 39°. Find opposite
Answer: 24.3cm -
4. Ratio Mixed ratio problems
Divide 140 in the ratio 3:1:3
Answer: 60, 20 and 60 -
5. Statistics Mean
Calculate the mean of: 29, 22, 48, 27, 18, 9, 23, 11
Answer: 23.4