Keystones — Lintel
Five GCSE retrieval questions · 31 January 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00003 in standard form
Answer: 3 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 72
Answer: (x + 9)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 36cm, angle = 37°. Find adjacent side. Give your answer to 2 decimal places
Answer: 28.75cm -
4. Ratio Mixed ratio problems
Divide 168 in the ratio 3:4:1
Answer: 63, 84 and 21 -
5. Statistics Mean
Calculate the mean of: 43, 5, 22, 48, 32, 18, 25, 21
Answer: 26.75