Keystones — Lintel
Five GCSE retrieval questions · 26 October 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00019 in standard form
Answer: 1.9 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 5
Answer: (x + 5)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 33cm, angle = 63°. Find adjacent side. Give your answer to 2 decimal places
Answer: 14.98cm -
4. Ratio Mixed ratio problems
Simplify: 24:24:16
Answer: 3:3:2 -
5. Statistics Mean
Calculate the mean of: 6, 11, 11, 24, 18, 22, 19, 47
Answer: 19.75