Keystones — Lintel
Five GCSE retrieval questions · 29 March 2016 · 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 - 21x + 108
Answer: (x - 9)(x - 12) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 39cm, angle = 43°. Find adjacent side. Give your answer to 2 decimal places
Answer: 28.52cm -
4. Ratio Mixed ratio problems
Simplify the ratio 7m : 55cm
Answer: 140:11 -
5. Statistics Mean
Calculate the mean of: 8, 49, 36, 5, 43, 6, 46, 30. Give your answer to 2 decimal places
Answer: 27.88