Keystones — Lintel
Five GCSE retrieval questions · 22 July 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0021 in standard form
Answer: 2.1 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 32
Answer: (x + 8)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 54°. Find adjacent side. Give your answer to 2 decimal places
Answer: 20.57cm -
4. Ratio Mixed ratio problems
Simplify the ratio 2kg : 450g
Answer: 40:9 -
5. Statistics Mean
Calculate the mean of: 22, 40, 16, 6, 31, 45, 47, 47
Answer: 31.75