Keystones — Lintel
Five GCSE retrieval questions · 4 July 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.052
Answer: 5.2 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 28
Answer: (x - 7)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 42°. Find adjacent side
Answer: 26cm -
4. Ratio Mixed ratio problems
Express the first part of 6:4 as a fraction in simplest form
Answer: 3⁄5 -
5. Statistics Mean
The mean of 5 numbers is 33. If 4 of them are 17, 43, 35, 27, what is the missing number?
Answer: 43