Keystones — Lintel
Five GCSE retrieval questions · 11 June 2019 · mathsvault.uk/keystones
-
1. Number Converting to standard form
0.034
Answer: 3.4 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 6
Answer: (x + 3)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 17cm, angle = 51°. Find adjacent side
Answer: 10.7cm -
4. Ratio Mixed ratio problems
In ratio 3:2:1, what fraction is the second part?
Answer: 2⁄6 -
5. Statistics Mean
The mean of 5 numbers is 28. If 4 of them are 25, 18, 26, 20, what is the missing number?
Answer: 51