Keystones — Lintel
Five GCSE retrieval questions · 24 January 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000019 in standard form
Answer: 1.9 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 12
Answer: (x + 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 31cm, angle = 38°. Find adjacent side. Give your answer to 2 decimal places
Answer: 24.43cm -
4. Ratio Mixed ratio problems
Divide 174 in the ratio 3:2:1
Answer: 87, 58 and 29 -
5. Statistics Mean
Calculate the mean of: 48, 21, 13, 29, 16, 37. Give your answer to 2 decimal places
Answer: 27.33