Keystones — Lintel
Five GCSE retrieval questions · 12 October 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.038
Answer: 3.8 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 4
Answer: (x + 4)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 39°. Find adjacent side
Answer: 27.2cm -
4. Ratio Mixed ratio problems
Divide 150 in the ratio 1:3:1
Answer: 30, 90 and 30 -
5. Statistics Mean
Calculate the mean of: 26, 5, 42, 42, 43, 24, 19
Answer: 28.7