Keystones — Lintel
Five GCSE retrieval questions · 17 January 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 6,600,000 in standard form
Answer: 6.6 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 20
Answer: (x + 5)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 20cm, angle = 65°. Find adjacent side. Give your answer to 2 decimal places
Answer: 8.45cm -
4. Ratio Mixed ratio problems
Simplify: 12:15:6
Answer: 4:5:2 -
5. Statistics Mean
Calculate the mean of: 16, 16, 16, 15, 9, 24, 5. Give your answer to 2 decimal places
Answer: 14.43