Keystones — Lintel
Five GCSE retrieval questions · 1 August 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.088 in standard form
Answer: 8.8 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 8x - 20
Answer: (x + 10)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 36cm, angle = 33°. Find adjacent side. Give your answer to 2 decimal places
Answer: 30.19cm -
4. Ratio Mixed ratio problems
Divide 76 in the ratio 1:1:2
Answer: 19, 19 and 38 -
5. Statistics Mean
Calculate the mean of: 33, 38, 49, 21, 45, 14, 32. Give your answer to 2 decimal places
Answer: 33.14