Keystones — Lintel
Five GCSE retrieval questions · 18 October 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0027 in standard form
Answer: 2.7 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 12
Answer: (x + 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 58°. Find opposite. Give your answer to 2 decimal places
Answer: 35.21cm -
4. Ratio Mixed ratio problems
Red, blue and green beads are in the ratio 11:5:10. What fraction of the beads are red?
Answer: 11⁄26 -
5. Statistics Mean
Calculate the mean of: 44, 48, 38, 10, 43, 16, 8, 12. Give your answer to 2 decimal places
Answer: 27.38