Keystones — Lintel
Five GCSE retrieval questions · 18 May 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0099 in standard form
Answer: 9.9 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 8
Answer: (x + 2)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 27cm, angle = 58°. Find adjacent side. Give your answer to 2 decimal places
Answer: 14.31cm -
4. Ratio Mixed ratio problems
Divide 56 in the ratio 2:1:1
Answer: 28, 14 and 14 -
5. Statistics Mean
Calculate the mean of: 42, 40, 28, 26, 39, 10, 12. Give your answer to 2 decimal places
Answer: 28.14