Keystones — Lintel
Five GCSE retrieval questions · 17 July 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0048
Answer: 4.8 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 8
Answer: (x - 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 57°. Find opposite
Answer: 40cm -
4. Ratio Mixed ratio problems
In ratio 2:3:1, what fraction is the second part?
Answer: 3⁄6 -
5. Statistics Mean
The mean of 5 numbers is 26. If 4 of them are 36, 23, 34, 32, what is the missing number?
Answer: 5