Keystones — Lintel
Five GCSE retrieval questions · 31 May 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0017 in standard form
Answer: 1.7 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 63
Answer: (x + 9)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 38cm, angle = 31°. Find adjacent side. Give your answer to 2 decimal places
Answer: 32.57cm -
4. Ratio Mixed ratio problems
Divide 216 in the ratio 3:2:3
Answer: 81, 54 and 81 -
5. Statistics Mean
Calculate the mean of: 14, 10, 16, 31, 25, 8, 30, 50
Answer: 23