Keystones — Lintel
Five GCSE retrieval questions · 9 November 2019 · mathsvault.uk/keystones
-
1. Number Converting to standard form
67000000
Answer: 6.7 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 12
Answer: (x + 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 51°. Find opposite
Answer: 27.2cm -
4. Ratio Mixed ratio problems
In ratio 2:2:1, what fraction is the second part?
Answer: 2⁄5 -
5. Statistics Mean
The mean of 4 numbers is 26. If 3 of them are 47, 33, 18, what is the missing number?
Answer: 6