Keystones — Lintel
Five GCSE retrieval questions · 25 January 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 84,000,000 in standard form
Answer: 8.4 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 16
Answer: (x + 8)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 28cm, angle = 59°. Find opposite. Give your answer to 2 decimal places
Answer: 46.6cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4 hours : 20 minutes
Answer: 12:1 -
5. Statistics Mean
Calculate the mean of: 42, 27, 37, 10, 13, 38, 34. Give your answer to 2 decimal places
Answer: 28.71