Keystones — Lintel
Five GCSE retrieval questions · 16 February 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
25000
Answer: 2.5 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 28
Answer: (x - 4)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 33°. Find adjacent side
Answer: 29.4cm -
4. Ratio Mixed ratio problems
Express the first part of 5:2 as a fraction in simplest form
Answer: 5⁄7 -
5. Statistics Mean
The mean of 5 numbers is 35. If 4 of them are 26, 29, 25, 25, what is the missing number?
Answer: 70