Keystones — Lintel
Five GCSE retrieval questions · 2 February 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.042 in standard form
Answer: 4.2 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 6
Answer: (x + 2)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 30cm, angle = 63°. Find adjacent side. Give your answer to 2 decimal places
Answer: 13.62cm -
4. Ratio Mixed ratio problems
Simplify the ratio 3kg : 50g
Answer: 60:1 -
5. Statistics Mean
Calculate the mean of: 5, 49, 22, 9, 41, 44. Give your answer to 2 decimal places
Answer: 28.33