Keystones — Lintel
Five GCSE retrieval questions · 2 May 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
85000
Answer: 8.5 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 10
Answer: (x - 2)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 22cm, angle = 45°. Find adjacent side
Answer: 15.6cm -
4. Ratio Mixed ratio problems
In ratio 3:3:4, what fraction is the second part?
Answer: 3⁄10 -
5. Statistics Mean
The mean of 6 numbers is 26. If 5 of them are 36, 35, 16, 17, 50, what is the missing number?
Answer: 2