Keystones — Lintel
Five GCSE retrieval questions · 27 August 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
83000000
Answer: 8.3 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 28
Answer: (x - 4)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 45°. Find opposite
Answer: 20cm -
4. Ratio Mixed ratio problems
Divide 140 in the ratio 1:2:2
Answer: 28, 56 and 56 -
5. Statistics Mean
Calculate the mean of: 12, 15, 6, 6, 33, 16, 49, 18
Answer: 19.4