Keystones — Lintel
Five GCSE retrieval questions · 18 December 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
40000000
Answer: 4 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 30
Answer: (x + 6)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 37cm, angle = 30°. Find adjacent side
Answer: 32cm -
4. Ratio Mixed ratio problems
Express the first part of 4:5 as a fraction in simplest form
Answer: 4⁄9 -
5. Statistics Mean
Calculate the mean of: 19, 18, 11, 30, 43, 33, 23, 44
Answer: 27.6