Keystones — Lintel
Five GCSE retrieval questions · 16 November 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00083
Answer: 8.3 × 10^-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 14
Answer: (x + 7)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 23cm, angle = 59°. Find opposite
Answer: 38.3cm -
4. Ratio Mixed ratio problems
Simplify: 6:15:9
Answer: 2:5:3 -
5. Statistics Mean
Calculate the mean of: 35, 22, 48, 21, 34, 38
Answer: 33