Keystones — Lintel
Five GCSE retrieval questions · 4 February 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.098
Answer: 9.8 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 15
Answer: (x - 3)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 41°. Find opposite
Answer: 25.2cm -
4. Ratio Mixed ratio problems
Divide 144 in the ratio 3:4:2
Answer: 48, 64 and 32 -
5. Statistics Mean
Calculate the mean of: 12, 25, 41, 13, 36, 10
Answer: 22.8