Keystones — Lintel
Five GCSE retrieval questions · 21 May 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000071 in standard form
Answer: 7.1 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² + 8x + 16
Answer: (x + 4)(x + 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 26cm, angle = 41°. Find adjacent side. Give your answer to 2 decimal places
Answer: 19.62cm -
4. Ratio Mixed ratio problems
Simplify the ratio 3 hours : 5 minutes
Answer: 36:1 -
5. Statistics Mean
Calculate the mean of: 27, 34, 49, 16, 42, 28, 45. Give your answer to 2 decimal places
Answer: 34.43