Keystones — Lintel
Five GCSE retrieval questions · 20 February 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 840,000 in standard form
Answer: 8.4 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 20x + 100
Answer: (x + 10)(x + 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 38°. Find adjacent side. Give your answer to 2 decimal places
Answer: 22.06cm -
4. Ratio Mixed ratio problems
Simplify the ratio 1 litre : 900 ml
Answer: 10:9 -
5. Statistics Mean
Calculate the mean of: 12, 30, 5, 50, 22, 15. Give your answer to 2 decimal places
Answer: 22.33