Keystones — Lintel
Five GCSE retrieval questions · 26 December 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0044
Answer: 4.4 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 5
Answer: (x + 5)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 40cm, angle = 58°. Find adjacent side
Answer: 21.2cm -
4. Ratio Mixed ratio problems
Divide 128 in the ratio 1:3:4
Answer: 16, 48 and 64 -
5. Statistics Mean
Calculate the mean of: 19, 27, 43, 49, 45, 12, 36, 42
Answer: 34.1