Keystones — Lintel
Five GCSE retrieval questions · 21 December 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
410000
Answer: 4.1 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 24
Answer: (x + 8)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 65°. Find adjacent side
Answer: 14.8cm -
4. Ratio Mixed ratio problems
In ratio 3:1:3, what fraction is the second part?
Answer: 1⁄7 -
5. Statistics Mean
The mean of 5 numbers is 32. If 4 of them are 45, 50, 39, 39, what is the missing number?
Answer: -13