Keystones — Lintel
Five GCSE retrieval questions · 12 February 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00042
Answer: 4.2 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x + 6
Answer: (x - 2)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 32°. Find opposite
Answer: 15cm -
4. Ratio Mixed ratio problems
Simplify the ratio 6m:600cm
Answer: 1:100 -
5. Statistics Mean
Calculate the mean of: 22, 35, 35, 43, 46, 15, 13
Answer: 29.9