Keystones — Lintel
Five GCSE retrieval questions · 11 December 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 60,000 in standard form
Answer: 6 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 11x + 30
Answer: (x + 6)(x + 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 21cm, angle = 56°. Find opposite. Give your answer to 2 decimal places
Answer: 31.13cm -
4. Ratio Mixed ratio problems
Red and blue sweets are in the ratio 10:7. What fraction of the sweets are blue?
Answer: 7⁄17 -
5. Statistics Mean
Calculate the mean of: 13, 33, 12, 8, 49, 11
Answer: 21