Keystones — Lintel
Five GCSE retrieval questions · 31 January 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 59,000,000 in standard form
Answer: 5.9 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 11x + 10
Answer: (x + 10)(x + 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 18cm, angle = 45°. Find adjacent side. Give your answer to 2 decimal places
Answer: 12.73cm -
4. Ratio Mixed ratio problems
Simplify: 24:16:8
Answer: 3:2:1 -
5. Statistics Mean
Calculate the mean of: 16, 10, 43, 49, 30, 9. Give your answer to 2 decimal places
Answer: 26.17