Keystones — Lintel
Five GCSE retrieval questions · 31 December 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00038 in standard form
Answer: 3.8 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 6
Answer: (x + 6)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 25cm, angle = 62°. Find adjacent side. Give your answer to 2 decimal places
Answer: 11.74cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4 litres : 150 ml
Answer: 80:3 -
5. Statistics Mean
Calculate the mean of: 36, 13, 29, 44, 33, 47, 44. Give your answer to 2 decimal places
Answer: 35.14