Keystones — Lintel
Five GCSE retrieval questions · 27 December 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.005
Answer: 5 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 28
Answer: (x - 4)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 19cm, angle = 64°. Find adjacent side
Answer: 8.3cm -
4. Ratio Mixed ratio problems
In ratio 3:1:1, what fraction is the second part?
Answer: 1⁄5 -
5. Statistics Mean
The mean of 6 numbers is 22. If 5 of them are 26, 16, 16, 42, 41, what is the missing number?
Answer: -9