Keystones — Lintel
Five GCSE retrieval questions · 23 August 2018 · mathsvault.uk/keystones
-
1. Number Converting to standard form
0.009
Answer: 9 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 12
Answer: (x + 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 40cm, angle = 55°. Find adjacent side
Answer: 22.9cm -
4. Ratio Mixed ratio problems
In ratio 4:4:3, what fraction is the second part?
Answer: 4⁄11 -
5. Statistics Mean
The mean of 4 numbers is 33. If 3 of them are 20, 17, 42, what is the missing number?
Answer: 53