Keystones — Lintel
Five GCSE retrieval questions · 24 June 2019 · 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 + 4x - 21
Answer: (x + 7)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 51°. Find adjacent side
Answer: 18.3cm -
4. Ratio Mixed ratio problems
In ratio 3:2:3, what fraction is the second part?
Answer: 2⁄8 -
5. Statistics Mean
Calculate the mean of: 47, 40, 19, 39, 47, 25
Answer: 36.2