Keystones — Lintel
Five GCSE retrieval questions · 2 April 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 82,000 in standard form
Answer: 8.2 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 27
Answer: (x + 9)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 20cm, angle = 56°. Find adjacent side. Give your answer to 2 decimal places
Answer: 11.18cm -
4. Ratio Mixed ratio problems
Simplify the ratio 3 hours : 30 minutes
Answer: 6:1 -
5. Statistics Mean
Calculate the mean of: 37, 40, 15, 40, 9, 35, 40, 41. Give your answer to 2 decimal places
Answer: 32.13