Keystones — Lintel
Five GCSE retrieval questions · 5 September 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0023 in standard form
Answer: 2.3 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x - 60
Answer: (x + 5)(x - 12) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 19cm, angle = 63°. Find adjacent side. Give your answer to 2 decimal places
Answer: 8.63cm -
4. Ratio Mixed ratio problems
Simplify the ratio 6m : 95cm
Answer: 120:19 -
5. Statistics Mean
Calculate the mean of: 24, 16, 12, 29, 36, 6
Answer: 20.5