Keystones — Lintel
Five GCSE retrieval questions · 7 April 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
6300000
Answer: 6.3 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 20
Answer: (x - 4)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 37cm, angle = 48°. Find adjacent side
Answer: 24.8cm -
4. Ratio Mixed ratio problems
In ratio 1:4:3, what fraction is the second part?
Answer: 4⁄8 -
5. Statistics Mean
The mean of 4 numbers is 25. If 3 of them are 43, 32, 40, what is the missing number?
Answer: -15