Keystones — Lintel
Five GCSE retrieval questions · 24 November 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
1500000
Answer: 1.5 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 14
Answer: (x - 7)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 16cm, angle = 38°. Find opposite
Answer: 12.5cm -
4. Ratio Mixed ratio problems
In ratio 1:1:4, what fraction is the second part?
Answer: 1⁄6 -
5. Statistics Mean
The mean of 4 numbers is 25. If 3 of them are 43, 33, 33, what is the missing number?
Answer: -9