Keystones — Lintel
Five GCSE retrieval questions · 15 September 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
87000
Answer: 8.7 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 21
Answer: (x - 7)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 55°. Find opposite
Answer: 15.7cm -
4. Ratio Mixed ratio problems
Divide 105 in the ratio 2:1:4
Answer: 30, 15 and 60 -
5. Statistics Mean
Calculate the mean of: 19, 48, 17, 14, 48, 43
Answer: 31.5