Keystones — Lintel
Five GCSE retrieval questions · 15 August 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 5,700,000 in standard form
Answer: 5.7 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 70
Answer: (x + 7)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 57°. Find adjacent side. Give your answer to 2 decimal places
Answer: 15.25cm -
4. Ratio Mixed ratio problems
Simplify the ratio 1 litre : 300 ml
Answer: 10:3 -
5. Statistics Mean
Calculate the mean of: 25, 6, 12, 21, 11, 28. Give your answer to 2 decimal places
Answer: 17.17