Keystones — Lintel
Five GCSE retrieval questions · 6 November 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 40,000 in standard form
Answer: 4 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 10
Answer: (x + 2)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 14cm, angle = 60°. Find opposite. Give your answer to 2 decimal places
Answer: 24.25cm -
4. Ratio Mixed ratio problems
Black and white beads are in the ratio 3:4. What fraction of the beads are black?
Answer: 3⁄7 -
5. Statistics Mean
Calculate the mean of: 27, 29, 21, 27, 22, 50, 38, 24
Answer: 29.75