Keystones — Lintel
Five GCSE retrieval questions · 7 December 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 110,000,000 in standard form
Answer: 1.1 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 60
Answer: (x + 10)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 64°. Find adjacent side. Give your answer to 2 decimal places
Answer: 12.71cm -
4. Ratio Mixed ratio problems
Divide 64 in the ratio 2:1:1
Answer: 32, 16 and 16 -
5. Statistics Mean
Calculate the mean of: 35, 33, 48, 47, 49, 38, 29, 37
Answer: 39.5