Keystones — Lintel
Five GCSE retrieval questions · 11 June 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 620,000,000 in standard form
Answer: 6.2 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 90
Answer: (x + 10)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 27cm, angle = 50°. Find adjacent side. Give your answer to 2 decimal places
Answer: 17.36cm -
4. Ratio Mixed ratio problems
Simplify: 8:8:10
Answer: 4:4:5 -
5. Statistics Mean
Calculate the mean of: 29, 22, 40, 44, 11, 12, 29, 28. Give your answer to 2 decimal places
Answer: 26.88