Keystones — Lintel
Five GCSE retrieval questions · 26 June 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0016 in standard form
Answer: 1.6 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 15
Answer: (x + 3)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 27cm, angle = 32°. Find adjacent side. Give your answer to 2 decimal places
Answer: 22.9cm -
4. Ratio Mixed ratio problems
Divide 145 in the ratio 1:2:2
Answer: 29, 58 and 58 -
5. Statistics Mean
Calculate the mean of: 40, 27, 47, 32, 8, 46. Give your answer to 2 decimal places
Answer: 33.33