Keystones — Lintel
Five GCSE retrieval questions · 1 June 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.074
Answer: 7.4 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 9
Answer: (x - 3)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 26°. Find adjacent side
Answer: 31.5cm -
4. Ratio Mixed ratio problems
Express the first part of 4:3 as a fraction in simplest form
Answer: 4⁄7 -
5. Statistics Mean
The mean of 4 numbers is 39. If 3 of them are 37, 41, 40, what is the missing number?
Answer: 38