Keystones — Lintel
Five GCSE retrieval questions · 24 October 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.071
Answer: 7.1 × 10^-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 48
Answer: (x + 8)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 41°. Find opposite
Answer: 9.6cm -
4. Ratio Mixed ratio problems
Divide 98 in the ratio 2:1:4
Answer: 28, 14 and 56 -
5. Statistics Mean
Calculate the mean of: 43, 41, 21, 11, 10, 38, 40
Answer: 29.1