Keystones — Lintel
Five GCSE retrieval questions · 22 October 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 470,000,000 in standard form
Answer: 4.7 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 40
Answer: (x + 4)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 39cm, angle = 31°. Find adjacent side. Give your answer to 2 decimal places
Answer: 33.43cm -
4. Ratio Mixed ratio problems
Divide 121 in the ratio 3:4:4
Answer: 33, 44 and 44 -
5. Statistics Mean
Calculate the mean of: 36, 22, 8, 36, 46, 6. Give your answer to 2 decimal places
Answer: 25.67