Keystones — Lintel
Five GCSE retrieval questions · 6 April 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00051
Answer: 5.1 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 28
Answer: (x + 7)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 32cm, angle = 47°. Find adjacent side
Answer: 21.8cm -
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: 37, 44, 16, 25, 12, 49
Answer: 30.5