Keystones — Lintel
Five GCSE retrieval questions · 19 May 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.076
Answer: 7.6 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 12
Answer: (x + 6)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 36cm, angle = 25°. Find adjacent side
Answer: 32.6cm -
4. Ratio Mixed ratio problems
Divide 176 in the ratio 3:2:3
Answer: 66, 44 and 66 -
5. Statistics Mean
Calculate the mean of: 40, 30, 22, 49, 8, 28, 17, 13
Answer: 25.9