Keystones — Lintel
Five GCSE retrieval questions · 18 January 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.083 in standard form
Answer: 8.3 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 14
Answer: (x + 2)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 20cm, angle = 30°. Find adjacent side. Give your answer to 2 decimal places
Answer: 17.32cm -
4. Ratio Mixed ratio problems
Divide 152 in the ratio 3:1:4
Answer: 57, 19 and 76 -
5. Statistics Mean
Calculate the mean of: 7, 36, 48, 6, 21, 27, 15, 32
Answer: 24