Keystones — Lintel
Five GCSE retrieval questions · 23 February 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 41,000 in standard form
Answer: 4.1 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 17x + 70
Answer: (x - 7)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 26cm, angle = 31°. Find adjacent side. Give your answer to 2 decimal places
Answer: 22.29cm -
4. Ratio Mixed ratio problems
Simplify the ratio £7 : 50p
Answer: 14:1 -
5. Statistics Mean
Calculate the mean of: 18, 49, 37, 8, 39, 12, 14, 45
Answer: 27.75