Keystones — Lintel
Five GCSE retrieval questions · 1 December 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
170000
Answer: 1.7 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 15
Answer: (x - 3)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 13cm, angle = 51°. Find opposite
Answer: 16.cm -
4. Ratio Mixed ratio problems
Divide 144 in the ratio 1:2:1
Answer: 36, 72 and 36 -
5. Statistics Mean
Calculate the mean of: 27, 29, 20, 49, 17, 22, 26
Answer: 27.1