Keystones — Lintel
Five GCSE retrieval questions · 9 June 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
28000
Answer: 2.8 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 16
Answer: (x - 4)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 27cm, angle = 58°. Find adjacent side
Answer: 14.3cm -
4. Ratio Mixed ratio problems
In ratio 2:3:2, what fraction is the second part?
Answer: 3⁄7 -
5. Statistics Mean
The mean of 5 numbers is 29. If 4 of them are 19, 29, 31, 44, what is the missing number?
Answer: 22