Keystones — Lintel
Five GCSE retrieval questions · 16 May 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
310000
Answer: 3.1 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 8
Answer: (x + 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 38cm, angle = 55°. Find adjacent side
Answer: 21.8cm -
4. Ratio Mixed ratio problems
Divide 76 in the ratio 1:1:2
Answer: 19, 19 and 38 -
5. Statistics Mean
Calculate the mean of: 34, 10, 18, 45, 44, 26
Answer: 29.5