Keystones — Lintel
Five GCSE retrieval questions · 4 October 2022 · mathsvault.uk/keystones
-
1. Number Converting to standard form
90000
Answer: 9 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 12
Answer: (x + 6)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 30cm, angle = 41°. Find opposite
Answer: 26.cm -
4. Ratio Mixed ratio problems
Simplify: 8:12:8
Answer: 2:3:2 -
5. Statistics Mean
The mean of 4 numbers is 30. If 3 of them are 38, 41, 38, what is the missing number?
Answer: 3