Keystones — Lintel
Five GCSE retrieval questions · 27 May 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 190,000,000 in standard form
Answer: 1.9 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 56
Answer: (x + 7)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 28cm, angle = 58°. Find opposite. Give your answer to 2 decimal places
Answer: 44.81cm -
4. Ratio Mixed ratio problems
Divide 230 in the ratio 3:3:4
Answer: 69, 69 and 92 -
5. Statistics Mean
Calculate the mean of: 26, 44, 46, 35, 31, 11. Give your answer to 2 decimal places
Answer: 32.17