Keystones — Lintel
Five GCSE retrieval questions · 22 August 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0062
Answer: 6.2 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 35
Answer: (x + 7)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 22cm, angle = 56°. Find adjacent side
Answer: 12.3cm -
4. Ratio Mixed ratio problems
Divide 91 in the ratio 3:1:3
Answer: 39, 13 and 39 -
5. Statistics Mean
Calculate the mean of: 8, 35, 42, 32, 5, 46, 7, 8
Answer: 22.9