Keystones — Lintel
Five GCSE retrieval questions · 26 December 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 9,800,000 in standard form
Answer: 9.8 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 80
Answer: (x + 10)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 30°. Find opposite. Give your answer to 2 decimal places
Answer: 6.35cm -
4. Ratio Mixed ratio problems
Simplify: 6:8:4
Answer: 3:4:2 -
5. Statistics Mean
Calculate the mean of: 9, 49, 21, 49, 40, 48
Answer: 36