Keystones — Lintel
Five GCSE retrieval questions · 7 May 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.047
Answer: 4.7 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 12
Answer: (x + 6)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 21cm, angle = 58°. Find adjacent side
Answer: 11.cm -
4. Ratio Mixed ratio problems
Divide 144 in the ratio 2:1:1
Answer: 72, 36 and 36 -
5. Statistics Mean
Calculate the mean of: 10, 47, 45, 25, 31, 10, 16
Answer: 26.3