Keystones — Lintel
Five GCSE retrieval questions · 4 August 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
960000
Answer: 9.6 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 24
Answer: (x - 6)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 14cm, angle = 47°. Find opposite
Answer: 15cm -
4. Ratio Mixed ratio problems
In ratio 2:2:3, what fraction is the second part?
Answer: 2⁄7 -
5. Statistics Mean
The mean of 5 numbers is 36. If 4 of them are 31, 28, 38, 46, what is the missing number?
Answer: 37