Keystones — Lintel
Five GCSE retrieval questions · 18 March 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0005
Answer: 5 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 8
Answer: (x - 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 62°. Find adjacent side
Answer: 16.4cm -
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 6 numbers is 39. If 5 of them are 47, 25, 35, 38, 45, what is the missing number?
Answer: 44