Keystones — Lintel
Five GCSE retrieval questions · 17 September 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.085
Answer: 8.5 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 12x + 36
Answer: (x - 6)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 21cm, angle = 28°. Find adjacent side
Answer: 18.5cm -
4. Ratio Mixed ratio problems
Simplify the ratio 7m:700cm
Answer: 1:100 -
5. Statistics Mean
The mean of 4 numbers is 25. If 3 of them are 30, 22, 43, what is the missing number?
Answer: 5