Keystones — Lintel
Five GCSE retrieval questions · 19 April 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0038 in standard form
Answer: 3.8 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 110
Answer: (x + 10)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 37cm, angle = 28°. Find adjacent side. Give your answer to 2 decimal places
Answer: 32.67cm -
4. Ratio Mixed ratio problems
Express the first part of 12:7 as a fraction in simplest form
Answer: 12⁄19 -
5. Statistics Mean
Calculate the mean of: 8, 18, 16, 37, 26, 28, 23, 21. Give your answer to 2 decimal places
Answer: 22.13