Keystones — Lintel
Five GCSE retrieval questions · 26 September 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
4200000
Answer: 4.2 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 18
Answer: (x - 3)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 24cm, angle = 45°. Find adjacent side
Answer: 17cm -
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 22. If 4 of them are 15, 43, 48, 37, what is the missing number?
Answer: -33