Keystones — Lintel
Five GCSE retrieval questions · 28 July 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000039 in standard form
Answer: 3.9 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 18x + 77
Answer: (x - 7)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 31°. Find adjacent side. Give your answer to 2 decimal places
Answer: 24.86cm -
4. Ratio Mixed ratio problems
Simplify: 8:24:8
Answer: 1:3:1 -
5. Statistics Mean
Calculate the mean of: 32, 49, 18, 35, 38, 35, 39, 10
Answer: 32