Keystones — Lintel
Five GCSE retrieval questions · 23 February 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0055 in standard form
Answer: 5.5 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 15x + 44
Answer: (x + 11)(x + 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 56°. Find opposite. Give your answer to 2 decimal places
Answer: 38.55cm -
4. Ratio Mixed ratio problems
Black, white and yellow sweets are in the ratio 8:11:10. What fraction of the sweets are yellow?
Answer: 10⁄29 -
5. Statistics Mean
Calculate the mean of: 7, 33, 43, 24, 8, 14, 14, 20. Give your answer to 2 decimal places
Answer: 20.38