Keystones — Lintel
Five GCSE retrieval questions · 27 March 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 3,900,000 in standard form
Answer: 3.9 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 63
Answer: (x + 7)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 34°. Find adjacent side. Give your answer to 2 decimal places
Answer: 23.21cm -
4. Ratio Mixed ratio problems
Divide 196 in the ratio 2:4:1
Answer: 56, 112 and 28 -
5. Statistics Mean
Calculate the mean of: 36, 33, 14, 5, 34, 33, 29, 7. Give your answer to 2 decimal places
Answer: 23.88