Keystones — Lintel
Five GCSE retrieval questions · 8 February 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00006 in standard form
Answer: 6 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 5
Answer: (x - 1)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 32°. Find adjacent side. Give your answer to 2 decimal places
Answer: 23.75cm -
4. Ratio Mixed ratio problems
Black and white counters are in the ratio 12:7. What fraction of the counters are black?
Answer: 12⁄19 -
5. Statistics Mean
Calculate the mean of: 36, 44, 26, 19, 46, 13. Give your answer to 2 decimal places
Answer: 30.67