Keystones — Lintel
Five GCSE retrieval questions · 16 July 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00066
Answer: 6.6 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 21
Answer: (x - 7)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 37cm, angle = 47°. Find adjacent side
Answer: 25.2cm -
4. Ratio Mixed ratio problems
Simplify the ratio 2m:200cm
Answer: 1:100 -
5. Statistics Mean
The mean of 4 numbers is 27. If 3 of them are 22, 37, 22, what is the missing number?
Answer: 27