Keystones — Lintel
Five GCSE retrieval questions · 23 July 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0032
Answer: 3.2 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x + 6
Answer: (x - 2)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 37cm, angle = 48°. Find adjacent side
Answer: 24.8cm -
4. Ratio Mixed ratio problems
In ratio 4:1:2, what fraction is the second part?
Answer: 1⁄7 -
5. Statistics Mean
The mean of 6 numbers is 36. If 5 of them are 15, 26, 50, 47, 24, what is the missing number?
Answer: 54