Keystones — Lintel
Five GCSE retrieval questions · 28 April 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
17000000
Answer: 1.7 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 20
Answer: (x + 5)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 17cm, angle = 35°. Find adjacent side
Answer: 13.9cm -
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 4 numbers is 34. If 3 of them are 50, 43, 19, what is the missing number?
Answer: 24