Keystones — Lintel
Five GCSE retrieval questions · 12 March 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
39000000
Answer: 3.9 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 16
Answer: (x + 8)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 46°. Find opposite
Answer: 26.9cm -
4. Ratio Mixed ratio problems
Simplify: 12:8:12
Answer: 3:2:3 -
5. Statistics Mean
Calculate the mean of: 25, 39, 13, 8, 46, 41, 20, 43
Answer: 29.4