Keystones — Lintel
Five GCSE retrieval questions · 5 November 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000022 in standard form
Answer: 2.2 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 28
Answer: (x - 4)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 16cm, angle = 26°. Find adjacent side. Give your answer to 2 decimal places
Answer: 14.38cm -
4. Ratio Mixed ratio problems
Divide 120 in the ratio 1:2:1
Answer: 30, 60 and 30 -
5. Statistics Mean
Calculate the mean of: 39, 49, 7, 16, 35, 11. Give your answer to 2 decimal places
Answer: 26.17