Keystones — Lintel
Five GCSE retrieval questions · 19 June 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0009
Answer: 9 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 15
Answer: (x + 5)(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 3:2 as a fraction in simplest form
Answer: 3⁄5 -
5. Statistics Mean
Calculate the mean of: 15, 26, 24, 24, 33, 46, 47, 6
Answer: 27.6