Keystones — Lintel
Five GCSE retrieval questions · 10 September 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.007 in standard form
Answer: 7 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 40
Answer: (x + 8)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 38cm, angle = 63°. Find adjacent side. Give your answer to 2 decimal places
Answer: 17.25cm -
4. Ratio Mixed ratio problems
Simplify the ratio 2 hours : 50 minutes
Answer: 12:5 -
5. Statistics Mean
Calculate the mean of: 24, 20, 22, 12, 39, 25, 13. Give your answer to 2 decimal places
Answer: 22.14