Keystones — Lintel
Five GCSE retrieval questions · 5 October 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0027
Answer: 2.7 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x + 4
Answer: (x - 2)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 42°. Find opposite
Answer: 19.8cm -
4. Ratio Mixed ratio problems
In ratio 1:2:4, what fraction is the second part?
Answer: 2⁄7 -
5. Statistics Mean
The mean of 6 numbers is 36. If 5 of them are 26, 43, 27, 38, 26, what is the missing number?
Answer: 56