Keystones — Lintel
Five GCSE retrieval questions · 23 November 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.035 in standard form
Answer: 3.5 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 14
Answer: (x + 2)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 17cm, angle = 61°. Find adjacent side. Give your answer to 2 decimal places
Answer: 8.24cm -
4. Ratio Mixed ratio problems
Express the first part of 12:13 as a fraction in simplest form
Answer: 12⁄25 -
5. Statistics Mean
Calculate the mean of: 50, 5, 22, 32, 29, 19, 48, 36. Give your answer to 2 decimal places
Answer: 30.13