Keystones — Lintel
Five GCSE retrieval questions · 2 December 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00024
Answer: 2.4 × 10^-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 3
Answer: (x + 3)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 31cm, angle = 32°. Find adjacent side
Answer: 26.3cm -
4. Ratio Mixed ratio problems
Simplify: 16:8:16
Answer: 2:1:2 -
5. Statistics Mean
Calculate the mean of: 26, 50, 30, 6, 50, 17
Answer: 29.8