Keystones — Lintel
Five GCSE retrieval questions · 22 July 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
84000000
Answer: 8.4 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 10
Answer: (x + 5)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 38cm, angle = 62°. Find adjacent side
Answer: 17.8cm -
4. Ratio Mixed ratio problems
Simplify: 9:6:9
Answer: 3:2:3 -
5. Statistics Mean
Calculate the mean of: 25, 7, 15, 13, 11, 16, 44, 31
Answer: 20.3