Keystones — Lintel
Five GCSE retrieval questions · 21 September 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
99000000
Answer: 9.9 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 18
Answer: (x - 3)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 27cm, angle = 44°. Find opposite
Answer: 26.cm -
4. Ratio Mixed ratio problems
In ratio 2:4:2, what fraction is the second part?
Answer: 4⁄8 -
5. Statistics Mean
Calculate the mean of: 10, 30, 9, 48, 13, 29
Answer: 23.2