Keystones — Lintel
Five GCSE retrieval questions · 24 May 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0044 in standard form
Answer: 4.4 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x - 32
Answer: (x + 4)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 15cm, angle = 35°. Find adjacent side. Give your answer to 2 decimal places
Answer: 12.29cm -
4. Ratio Mixed ratio problems
Black and white sweets are in the ratio 7:8. What fraction of the sweets are black?
Answer: 7⁄15 -
5. Statistics Mean
Calculate the mean of: 16, 46, 36, 39, 22, 22, 6, 18. Give your answer to 2 decimal places
Answer: 25.63