Keystones — Lintel
Five GCSE retrieval questions · 26 November 2019 · mathsvault.uk/keystones
-
1. Number Converting to standard form
0.012
Answer: 1.2 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 14
Answer: (x + 7)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 30cm, angle = 42°. Find opposite
Answer: 27cm -
4. Ratio Mixed ratio problems
In ratio 1:1:3, what fraction is the second part?
Answer: 1⁄5 -
5. Statistics Mean
Calculate the mean of: 46, 23, 14, 9, 6, 42, 21, 39
Answer: 25