Keystones — Lintel
Five GCSE retrieval questions · 17 March 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.022
Answer: 2.2 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 10
Answer: (x - 2)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 34cm, angle = 57°. Find adjacent side
Answer: 18.5cm -
4. Ratio Mixed ratio problems
Express the first part of 3:2 as a fraction in simplest form
Answer: 3⁄5 -
5. Statistics Mean
The mean of 4 numbers is 29. If 3 of them are 46, 19, 49, what is the missing number?
Answer: 2