Keystones — Lintel
Five GCSE retrieval questions · 21 January 2023 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.087
Answer: 8.7 × 10^-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 12
Answer: (x + 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 15cm, angle = 40°. Find adjacent side
Answer: 11.5cm -
4. Ratio Mixed ratio problems
Simplify: 16:16:12
Answer: 4:4:3 -
5. Statistics Mean
Calculate the mean of: 33, 34, 24, 38, 25, 6, 18
Answer: 25.4