Keystones — Lintel
Five GCSE retrieval questions · 24 August 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 29,000,000 in standard form
Answer: 2.9 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 70
Answer: (x + 7)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 16cm, angle = 36°. Find opposite. Give your answer to 2 decimal places
Answer: 11.62cm -
4. Ratio Mixed ratio problems
Divide 232 in the ratio 1:4:3
Answer: 29, 116 and 87 -
5. Statistics Mean
Calculate the mean of: 36, 46, 21, 30, 9, 18, 22
Answer: 26