Keystones — Lintel
Five GCSE retrieval questions · 12 December 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 87,000,000 in standard form
Answer: 8.7 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 24
Answer: (x - 3)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 30cm, angle = 59°. Find adjacent side. Give your answer to 2 decimal places
Answer: 15.45cm -
4. Ratio Mixed ratio problems
Simplify: 18:15:15
Answer: 6:5:5 -
5. Statistics Mean
Calculate the mean of: 34, 18, 31, 48, 31, 44, 37, 44. Give your answer to 2 decimal places
Answer: 35.88