Keystones — Lintel
Five GCSE retrieval questions · 27 March 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000023 in standard form
Answer: 2.3 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 12
Answer: (x + 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 37cm, angle = 26°. Find adjacent side. Give your answer to 2 decimal places
Answer: 33.26cm -
4. Ratio Mixed ratio problems
Simplify: 15:18:6
Answer: 5:6:2 -
5. Statistics Mean
Calculate the mean of: 42, 29, 39, 24, 22, 38. Give your answer to 2 decimal places
Answer: 32.33