Keystones — Lintel
Five GCSE retrieval questions · 6 July 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0052
Answer: 5.2 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 21
Answer: (x + 7)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 39cm, angle = 26°. Find adjacent side
Answer: 35.cm -
4. Ratio Mixed ratio problems
Express the first part of 3:5 as a fraction in simplest form
Answer: 3⁄8 -
5. Statistics Mean
Calculate the mean of: 6, 18, 38, 19, 40, 22, 16
Answer: 22.7