Keystones — Lintel
Five GCSE retrieval questions · 31 July 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 640,000,000 in standard form
Answer: 6.4 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 8x - 33
Answer: (x + 11)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 54°. Find opposite. Give your answer to 2 decimal places
Answer: 15.14cm -
4. Ratio Mixed ratio problems
Divide 175 in the ratio 3:1:3
Answer: 75, 25 and 75 -
5. Statistics Mean
Calculate the mean of: 28, 41, 19, 14, 14, 42. Give your answer to 2 decimal places
Answer: 26.33