Keystones — Lintel
Five GCSE retrieval questions · 30 December 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00086
Answer: 8.6 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 16
Answer: (x + 8)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 51°. Find opposite
Answer: 24.7cm -
4. Ratio Mixed ratio problems
Simplify: 12:6:10
Answer: 6:3:5 -
5. Statistics Mean
Calculate the mean of: 7, 18, 22, 31, 32, 11, 5, 47
Answer: 21.6