Keystones — Lintel
Five GCSE retrieval questions · 20 January 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.098
Answer: 9.8 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 10
Answer: (x - 2)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 42°. Find opposite
Answer: 10.8cm -
4. Ratio Mixed ratio problems
Divide 75 in the ratio 1:2:2
Answer: 15, 30 and 30 -
5. Statistics Mean
Calculate the mean of: 11, 8, 23, 6, 24, 29, 40, 36
Answer: 22.1