Keystones — Lintel
Five GCSE retrieval questions · 13 July 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.044
Answer: 4.4 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 10
Answer: (x + 5)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 24cm, angle = 46°. Find adjacent side
Answer: 16.7cm -
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 5 numbers is 33. If 4 of them are 27, 35, 25, 33, what is the missing number?
Answer: 45