Keystones — Lintel
Five GCSE retrieval questions · 7 January 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
31000000
Answer: 3.1 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 21
Answer: (x - 7)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 39°. Find opposite
Answer: 8.9cm -
4. Ratio Mixed ratio problems
Simplify the ratio 3m:300cm
Answer: 1:100 -
5. Statistics Mean
Calculate the mean of: 31, 36, 27, 27, 30, 33, 44
Answer: 32.6