Keystones — Lintel
Five GCSE retrieval questions · 21 March 2021 · mathsvault.uk/keystones
-
1. Number Converting to standard form
0.00041
Answer: 4.1 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 13x + 42
Answer: (x - 7)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 32°. Find adjacent side
Answer: 23.7cm -
4. Ratio Mixed ratio problems
In ratio 2:3:4, what fraction is the second part?
Answer: 3⁄9 -
5. Statistics Mean
The mean of 4 numbers is 34. If 3 of them are 46, 41, 46, what is the missing number?
Answer: 3