Keystones — Lintel
Five GCSE retrieval questions · 29 June 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00074 in standard form
Answer: 7.4 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 7
Answer: (x + 1)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 16cm, angle = 42°. Find adjacent side. Give your answer to 2 decimal places
Answer: 11.89cm -
4. Ratio Mixed ratio problems
Simplify: 12:20:20
Answer: 3:5:5 -
5. Statistics Mean
Calculate the mean of: 22, 37, 28, 40, 45, 27, 28, 42. Give your answer to 2 decimal places
Answer: 33.63