Keystones — Lintel
Five GCSE retrieval questions · 6 September 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0072
Answer: 7.2 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 8
Answer: (x - 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 40cm, angle = 34°. Find adjacent side
Answer: 33.2cm -
4. Ratio Mixed ratio problems
In ratio 4:3:2, what fraction is the second part?
Answer: 3⁄9 -
5. Statistics Mean
The mean of 4 numbers is 37. If 3 of them are 17, 19, 36, what is the missing number?
Answer: 76