Keystones — Lintel
Five GCSE retrieval questions · 4 October 2019 · mathsvault.uk/keystones
-
1. Number Converting to standard form
390000
Answer: 3.9 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 5
Answer: (x + 5)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 14cm, angle = 54°. Find opposite
Answer: 19.3cm -
4. Ratio Mixed ratio problems
Simplify: 18:9:15
Answer: 6:3:5 -
5. Statistics Mean
Calculate the mean of: 28, 32, 20, 43, 37, 25, 32
Answer: 31