Keystones — Lintel
Five GCSE retrieval questions · 7 January 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
40000
Answer: 4 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x + 4
Answer: (x - 2)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 17cm, angle = 54°. Find opposite
Answer: 23.4cm -
4. Ratio Mixed ratio problems
In ratio 2:1:4, what fraction is the second part?
Answer: 1⁄7 -
5. Statistics Mean
The mean of 6 numbers is 34. If 5 of them are 42, 20, 16, 25, 46, what is the missing number?
Answer: 55