Keystones — Lintel
Five GCSE retrieval questions · 10 March 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 59,000,000 in standard form
Answer: 5.9 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 15x + 56
Answer: (x + 8)(x + 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 18cm, angle = 43°. Find adjacent side. Give your answer to 2 decimal places
Answer: 13.16cm -
4. Ratio Mixed ratio problems
Divide 170 in the ratio 3:4:3
Answer: 51, 68 and 51 -
5. Statistics Mean
Calculate the mean of: 8, 50, 30, 30, 34, 27, 19, 32
Answer: 28.75