Keystones — Lintel
Five GCSE retrieval questions · 28 May 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 9,200,000 in standard form
Answer: 9.2 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 6
Answer: (x + 2)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 15cm, angle = 39°. Find opposite. Give your answer to 2 decimal places
Answer: 12.15cm -
4. Ratio Mixed ratio problems
Black and white beads are in the ratio 5:14. What fraction of the beads are black?
Answer: 5⁄19 -
5. Statistics Mean
Calculate the mean of: 38, 37, 14, 41, 38, 9, 45, 42
Answer: 33