Keystones — Lintel
Five GCSE retrieval questions · 24 May 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 130,000,000 in standard form
Answer: 1.3 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x - 45
Answer: (x + 5)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 30cm, angle = 55°. Find adjacent side. Give your answer to 2 decimal places
Answer: 17.21cm -
4. Ratio Mixed ratio problems
Divide 153 in the ratio 2:4:3
Answer: 34, 68 and 51 -
5. Statistics Mean
Calculate the mean of: 17, 24, 27, 30, 32, 23, 49, 36
Answer: 29.75