Keystones — Lintel
Five GCSE retrieval questions · 14 November 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0005 in standard form
Answer: 5 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 35
Answer: (x + 7)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 21cm, angle = 53°. Find adjacent side. Give your answer to 2 decimal places
Answer: 12.64cm -
4. Ratio Mixed ratio problems
Simplify: 16:24:8
Answer: 2:3:1 -
5. Statistics Mean
Calculate the mean of: 20, 37, 20, 45, 35, 17
Answer: 29