Keystones — Lintel
Five GCSE retrieval questions · 5 September 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 440,000,000 in standard form
Answer: 4.4 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 32
Answer: (x + 8)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 26cm, angle = 50°. Find adjacent side. Give your answer to 2 decimal places
Answer: 16.71cm -
4. Ratio Mixed ratio problems
Simplify the ratio 2kg : 300g
Answer: 20:3 -
5. Statistics Mean
Calculate the mean of: 47, 33, 12, 9, 11, 46, 31
Answer: 27