Keystones — Lintel
Five GCSE retrieval questions · 20 May 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 59,000,000 in standard form
Answer: 5.9 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 8x - 20
Answer: (x + 10)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 22cm, angle = 55°. Find adjacent side. Give your answer to 2 decimal places
Answer: 12.62cm -
4. Ratio Mixed ratio problems
Divide 190 in the ratio 2:2:1
Answer: 76, 76 and 38 -
5. Statistics Mean
Calculate the mean of: 47, 8, 34, 43, 26, 35. Give your answer to 2 decimal places
Answer: 32.17