Keystones — Lintel
Five GCSE retrieval questions · 20 November 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 110,000 in standard form
Answer: 1.1 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 28
Answer: (x + 7)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 21cm, angle = 38°. Find opposite. Give your answer to 2 decimal places
Answer: 16.41cm -
4. Ratio Mixed ratio problems
Divide 90 in the ratio 2:4:3
Answer: 20, 40 and 30 -
5. Statistics Mean
Calculate the mean of: 48, 49, 32, 20, 43, 43, 26. Give your answer to 2 decimal places
Answer: 37.29