Keystones — Lintel
Five GCSE retrieval questions · 21 October 2021 · mathsvault.uk/keystones
-
1. Number Converting to standard form
4400000
Answer: 4.4 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x + 6
Answer: (x - 2)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 23cm, angle = 64°. Find adjacent side
Answer: 10.cm -
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 6 numbers is 26. If 5 of them are 34, 32, 20, 49, 40, what is the missing number?
Answer: -19