Keystones — Lintel
Five GCSE retrieval questions · 5 October 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00085 in standard form
Answer: 8.5 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 6
Answer: (x + 6)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 17cm, angle = 52°. Find adjacent side. Give your answer to 2 decimal places
Answer: 10.47cm -
4. Ratio Mixed ratio problems
Simplify the ratio kg : 550g
Answer: 20:11 -
5. Statistics Mean
Calculate the mean of: 44, 49, 27, 9, 50, 48, 27, 7. Give your answer to 2 decimal places
Answer: 32.63