Keystones — Lintel
Five GCSE retrieval questions · 7 December 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 410,000,000 in standard form
Answer: 4.1 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 80
Answer: (x + 10)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 33cm, angle = 63°. Find adjacent side. Give your answer to 2 decimal places
Answer: 14.98cm -
4. Ratio Mixed ratio problems
Simplify: 16:12:20
Answer: 4:3:5 -
5. Statistics Mean
Calculate the mean of: 32, 47, 45, 45, 34, 29. Give your answer to 2 decimal places
Answer: 38.67