Keystones — Lintel
Five GCSE retrieval questions · 14 June 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000059 in standard form
Answer: 5.9 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 12
Answer: (x - 3)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 29°. Find adjacent side. Give your answer to 2 decimal places
Answer: 24.49cm -
4. Ratio Mixed ratio problems
Simplify the ratio 5 hours : 20 minutes
Answer: 15:1 -
5. Statistics Mean
Calculate the mean of: 38, 39, 15, 39, 9, 41. Give your answer to 2 decimal places
Answer: 30.17