Keystones — Lintel
Five GCSE retrieval questions · 8 November 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00069
Answer: 6.9 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 12x + 36
Answer: (x - 6)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 54°. Find opposite
Answer: 33cm -
4. Ratio Mixed ratio problems
Divide 270 in the ratio 3:2:4
Answer: 90, 60 and 120 -
5. Statistics Mean
Calculate the mean of: 23, 25, 43, 40, 20, 14
Answer: 27.5