Keystones — Lintel
Five GCSE retrieval questions · 10 April 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000067 in standard form
Answer: 6.7 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 72
Answer: (x + 9)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 41°. Find opposite. Give your answer to 2 decimal places
Answer: 19.12cm -
4. Ratio Mixed ratio problems
Red, blue and green sweets are in the ratio 6:8:4. What fraction of the sweets are green?
Answer: 2⁄9 -
5. Statistics Mean
Calculate the mean of: 28, 49, 15, 10, 18, 33
Answer: 25.5