Keystones — Lintel
Five GCSE retrieval questions · 2 March 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000095 in standard form
Answer: 9.5 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 12x + 27
Answer: (x - 3)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 17cm, angle = 35°. Find adjacent side. Give your answer to 2 decimal places
Answer: 13.93cm -
4. Ratio Mixed ratio problems
Black and white beads are in the ratio 14:3. What fraction of the beads are white?
Answer: 3⁄17 -
5. Statistics Mean
Calculate the mean of: 9, 48, 32, 41, 35, 18, 46, 17
Answer: 30.75