Keystones — Lintel
Five GCSE retrieval questions · 7 October 2022 · mathsvault.uk/keystones
-
1. Number Converting to standard form
0.00063
Answer: 6.3 × 10^-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 12x + 35
Answer: (x - 5)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 38cm, angle = 57°. Find adjacent side
Answer: 20.7cm -
4. Ratio Mixed ratio problems
Express the first part of 2:3 as a fraction in simplest form
Answer: 2⁄5 -
5. Statistics Mean
The mean of 5 numbers is 32. If 4 of them are 50, 16, 46, 21, what is the missing number?
Answer: 27