Keystones — Lintel
Five GCSE retrieval questions · 31 December 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 49,000,000 in standard form
Answer: 4.9 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 19x + 90
Answer: (x + 10)(x + 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 44°. Find adjacent side. Give your answer to 2 decimal places
Answer: 20.86cm -
4. Ratio Mixed ratio problems
Simplify the ratio £5 : 90p
Answer: 50:9 -
5. Statistics Mean
Calculate the mean of: 32, 21, 45, 18, 26, 33. Give your answer to 2 decimal places
Answer: 29.17